Washington, D.C. Philip Retz. Split casting block-off for gas or water in oil drilling. No 4,501,327. 39 Claims.

James G. Kane. Foot and leg exercising device. No. 4,501,421. 10 Claims. Maryland

Robert H. Proctor, of Cockeysville. Wire grip clamp with radially-directed screw take-up. No. 4,497,090. 13 Claims.

Barney L. Byrum, of Bethesda. Motion and orientation sensor. No. 4,497,118. 15 Claims.

John P. Fitzgerald, of Baltimore. Rodent trap. No. 4,497,130. 2 Claims.

Richard A. Ferris, of Rockville; Roger M. Hess, of Mount Airy, N.C., and James R. Garman, of Thurmont. Security enclosure for an automatic teller machine. No. 4,497,261. 8 Claims.

Stanislaus J. Otto, of Silver Spring, and Verle L. Doty, of Harrison, Ohio. Load-unload device-limit overload sensing device. No. 4,497,400. 8 Claims.

Edward L. McHugh, of Bethesda. Protective book cover. No. 4,497,508. 7 Claims.

Arthur P. Chase, of Potomac. Tunnel lining. No. 4,497,590. 14 Claims.

Satish K. Wason, of Churchville. Thixotropic unsaturated polyester compositions and methods. No. 4,497,918. 16 Claims.

David Glickman, of Frederick. Comparing input words to a word dictionary for correct spelling. No. 4,498,148. 7 Claims.

Ronald R. Purdy, of Ellicott City. Emergency stopping brake system for tractors and trailers. No. 4,498,560. 9 Claims.

Wilbur C. Halter, of Uniontown. Adjustable pipe clamp holders. No. 4,498,662. 2 Claims.

Warren A. Pardo, of Bel Air. Pressure cooker lid latch and lock. No. 4,498,695. 40 Claims.

Viktor DeJeney, of Riverdale. Device to correct the malfunction in film feed of a perforated film through a light beam. No. 4,498,745. 8 Claims.

Robin D. O'Dell, of Pasadena; Israel S. Ungar, and Herbert I. Scher, both of Randallstown. Scuff-resistant laminates. No. 4,499,137. 9 Claims.

Mark A. Seese, of Ellicott City, and Robert L. Chiang, of Anaheim, Calif. Co-gel catalyst manufacture. No. 4,499,197. 15 Claims.

Michael E. Sitzann, of Adelphi, and William H. Gilligan, of Fort Washington. Derivatives of energetic orthoformates. No. 4,499,309. 6 Claims.

Richard F. Greene, of Bethesda. Heterojunction schottky gate mesfet with lower channel ridge barrier. No. 4,499,481. 11 Claims.

Norman F. Brickman, of Potomac, and Walter S. Rosenbaum, of Bethesda. Method for identification and compression of facsimile symbols in text processing systems. No. 4,499,499. 6 Claims.

Nathan Bluzer, of Silver Spring. Semiconductor circuit for compressing the dynamic range of a signal. No. 4,499,590. 24 Claims.

John R. Wilhelm, of Rockville. Water closet modifications. No. 4,499,617. 10 Claims.

Francis J. Kub, of Pasadena, and William M. Evey, of Baltimore. Small dimension field effect transistor using phosphorous-doped silicon glass reflow process. No. 4,499,653. 19 Claims.

Robert P. Kaste, of Bel Air. Bank firing attachment including pivotal locking lugs. No. 4,499, 811. 4 Claims.

John N. Majerus, of Rising Sun, and William P. Walters, of Newark, Del. High lethality warheads. No. 4,499,830. 9 Claims.

John G. Lord, of Tilghman Island. Sail rigging and control system. No. 4,499,841. 8 Claims.

Philip Calabro, of Silver Spring. Moast support assembly. No. 4,500,064. 17 Claims.

Fredrick L. Schaff, of Ellicott City, and Milton Gottlieb, of Churchill, Pa. Method and apparatus for light chopping by acousto-optic refraction. No. 4,500,175. 13 Claims.

Henry D. Ward, Jr., of Cockeysville, and John R. West, of Glyndon. Blank stacking apparatus. No. 4,500,243. 24 Claims.

Louis M. Sardella, of Towson, and William F. Ward Sr., of Hampstead. Air lift for blank stackers. No. 4,500,244. 4 Claims.

Jack Evans, of Baltimore, and Philip A. Studer, of Silver Spring. Magnetically actuated compressor. No. 4,500,265. 14 Claims.

Wilson E. Bradley Jr., of Ellicott City, and Palle Rye, of Reading, Pa. Drift eliminator. No. 4,500,330. 19 Dlaims.

Joseph D. Bova, of Fallston. Method land apparatus for continuous production of expandable honeycomb. 14 Claims.

John C. Schmidt, of Baltimore; Clifton A. Sands, of Oxon Hill, and Donald N. Campbell, of Timonium. Method of and system for real time differential pulse detection. No. 4,500,391. 24 Claims.

John H. Boucher, of Silver Spring. Method of treating horses to inhibit or reduce increases in crenated red blood cells during exercise. No. 4,500,530. 2 Claims.

David M. Neville Jr., of Bethesda, and Richard J. Youle, of Washington, D.C. Prevention of graft versushost disease following bone marrow transplantation. No. 4,500,637. 2 Claims.

James L. Guthrie, of Ashton, and Ronald T. Wojcik, of Ellicott City. Reactive adhesive dispersion and method of use. No. 4,500,703. 11 Claims.

Craig D. Walrath, of Catonsville. Electro-optical tracking system with adaptive bearing friction compensation. No. 4,500,823. 6 Claims.

Krishnamoorthy Virupaksha, of Brookeville, and Henri G. Suyderhoud, of Potomac. Adaptive gain variable bit rate nic processor. No. 4,500,842. 9 Claims.

William H. Childs, of Gaithersburg. Simplified minimum shift keying modulator. No. 4,500,856. 11 Claims.

Osamu Shimbo, of Bethesda; Lan N. Nguyen, of Annandale, Va., and Jack L. Dicks, of Alexandria, Va. Equalizer for reducing crosstalk between two fdm/fm carriers in a satellite communications system. No. 4,500.984. 6 Claims.

Krishnamooethy Virupaksha, of Rockville, and Samuel J. Campanella, of Gaithersburg. Variable slope delta coding processor using adaptive prediction. No. 4,501,001. 24 Claims.

Chris L. Christman, of Silver Spring. Ultrasonic therapy applicator that measures dosage. No. 4,501,151. 11 Claims.

Seymour Edelman, of Silver Spring, and Lowell D. Ballard, of Sterling Park, Va. Piezoelectric polymer heat exchanger. No. 4,501,319. 2 Claims.

Isaias Loulos, of Knoxville. Method and apparatus for cleaning waste gases from aluminum production facilities. No. 4,501,599. 14 Claims.

Ramesh C. Pandey; Margaret W. Toussaint; Jeffrey C. McGuire, all of Frederick, and Monica C. Thomas, of Columbia. Maggiemycin, anhydromaggiemycin and processes for making. No. 4,501,699. 4 Claims.

Albert F. Handermann, of Ijansville; Jerry C. Trippe, of Fairfax Station, Va., and Paul F. Waters, of Washington, D.C. Dissolving water soluble polymers. No. 4,501,828. 15 Claims.

Richard Miller, of Crofton, and Janine M. Rizer, of Mechanicsville. Rapid-set lightweight cement product. No. 4,501,830. 8 Claims.

Peter Mueller, of Gaithersburg; Michael G. Ury, of Bethesda, and Charles H. Wood, of Rockville. Deep uv lamp bulb. No. 4,501,993. 2 Claims.

Heber J. Morrison, of Ellicott City, and Lawrence W. Koenig, of Linthicum. Power amplifier with controllable lossless snubber circuit. No. 4,02,085. 15 Claims. Maryland Design Patents

Constantine Eisinger, of Bethesda. Cap. No. D 277,426.

Edward A. Barnik, of Reisterstown. Cordless jig saw. No. D 277,451.

Peggy Noble, of Baltimore. Toilet tissue roll cover. No. D 277,714. Virginia

James F. Olmsted, of Arlington, et al. Thermodynamic conditioning of air or any other gas to increase the operating efficiency of diverse energy consuming systems. No. 4,493,750. 11 Claims.

Sidney E. Veazey, of Fredericksburg. Mastless sails. No. 4,497,272. 4 Claims.

Frank J. Brandenburg Jr., of Ashland. Sun tracking solar air heating system. No. 4,497,311. 10 Claims.

Joseph L. Banyasz, of Richmond; Cassandra D. Owens, of Petersburg; Elizabeth D. Mooz, of Richmond; A. Clifton Lilly Jr., of Richmond; Peter Martin, of Richmond; Henry B. Merritt, of Richmond, and Bernard A. Semp, of Richmond. Process for increasing the filling power of tobacco. No. 4,497,330. 18 Claims.

Paul K. Lippolt, of Falls Church. Adjustable volin peg and dowel shaving device. No. 4,497,352. 9 Claims.

Michael A. Tabet, of Norfolk. Rotable split-handled cooking utensil. No. 4,497,417. 5 Claims.

Kenneth G. Thorsted, of Fredericksburg, and John W. Pennington, of Spotsylvania. Erodable spin turbin for tube-launched missiles. No. 4,497,460. 3 Claims.

R. Danford Lehman Jr. and Michael F. Williams, both of McLean. Game with shields for deflecting hurled projectile. No. 4,497,492. 19 Claims.

Randall W. Ojanen, of Bristol. Rotating cutting bit. No. 4,497,520. 15 Claims.

William E. Streetman, of Williamsburg. Method for the production of melamine/aldehyde filaments. No. 4,497,934. 10 Claims.

Anne K. St. Clair, and Terry L. St. Clair, both of Poquoson. Elastomer toughened polyimide adhesives. No. 4,497,935. 10 Claims.

William W. Sproul III, of Reston. Interrupt processor. No. 4,498,136. 2 Claims.

James H. Bowen, of Williamsburg. Tdm communication system. No. 4,498,167. 22 Claims.

Terrace E. Rogers, of Portsmouth. Digital automatic frequency control with tracking. No. 4,498,191. 5 Claims.

Johannes J. Vandegraaf, of Lynchburg. Multifrequency scanning receiver with priority frequency monitoring. No. 4,498,194. 10 Claims.

William A. Gutierrez and Herbert L. Wilson, both of Woodbridge. Method of forming variable sensitivity transmission mode negative electron affinity photocathode. No. 4,498,225. 5 Claims.

James A. Bowling, of Midlothian, and Wallace M. David, of Richmond. Method and apparatus for embossing foil. No. 4,498,390. 9 Claims.

Robert N. Smith, of Richmond. Tobacco bale steam injection. No. 4,498,486. 5 Claims.

Horst F. W. Arfert, of Midlothian, and Reynaldo P. Leyco, of Chesterfield County. Method and aparatus for conveying articles. No. 4,498,575. 2 Claims.

Chester C. Boesewetter, of Radford; Lawrence W. Langley, of Chritianburg, and John H. Mable, of Radford. Stator winding apparatus and method. No. 4,498,636. 12 Claims.

Marvin W. Ward, of Springfield. Data monitoring connector for testing transmission links. No. 4,498,716. 11 Claims.

Donald A. Full, of Richmond. Heated die for carbonized material. No. 4,498,858. 6 Claims.

Marilyn D. Faison, of Richmond. System for teaching visual discrimination of spatially oriented subject matter. No. 4,498,869. 9 Claims.

Richard A. Gross, of Richmond. Tampon applicator. No. 4,498,899. 9 Claims.

Robert S. Scheffee, of Lorton. Coal-water fuel slurries and process for making. No. 4,498,906. 68 Claims.

Alexander P. Janssen, of Charlottesville. Visible indexes. No. 4,499,132. 2 Claims.

David L. Wetzel, of Charlottesville. Key telephone system signalling and control arrangement. No. 4,499,338. 3 Claims.

Reiner G. Brinker, of Mechanicsville. Laser beam iiterruptier and divider. No. 4,499,361. 8 Claims.

Peter Martin, of Richmond. Rotary beam chopper with continuously variable duty cycle. No. 4,499,362. 12 Claims.

Gary Hartwell, of Troy. Fluoroscopic filtering. No. 4,499,591. 12 Claims.

Willie M. Uska, of Roanoke. Symmetrically clamped fiber optic receiver. No. 4,499,609. 6 Claims.

Randall C. Davis, of Poquoson. Course correction calculator. No. 4,499,65. 5 Claims.

Neill R. Wilson, of Berryville. Self-adjusting locking wrench. No. 4,499,797. 14 Claims.

Alexander P. Janssen, of Charlottesville. Disposable cooking bags. No. 4,499,817. 14 Claims.

Richard M. Berger, of Midlothian. Free air dilution smoke filter and method and apparatus for fabricating same. No. 4,499,912. 14 Claims.

Bruce W. Rentch, of Annandale. Phonograph record and album frame. No. 4,499,994. 15 Claims.

Rolf Brand, of South Hill. Propeller and engine mounting device. No. 4,500,053. 26 Claims.

Donald L. Cummins, of Hopewell. Linear peristaltic pump. No. 4,500,266. 11 Claims.

Donald W. Smith, of Fincastle. Underwater pelletizer with adjustable blade assembly. No. 4,500,271. 6 Claims.

Stanley R. Cochran, of Midlothian, and Francis W. Strahorn, of Hockessin, Del. Yarn heat treatment apparatus. No. 4,500,278. 2 Claims.

John DeLigt, of Covington. Method of using a veneer butt-end splicer. No. 4,500,376. 4 Claims.

James R. Shanklin Jr. and Christopher P. Johnson III, both of Richmond. Method of treating cardiac disorders with N-(aryloxyalkyl)-N-(aminoalkyl) ureas. No. 4,500,429. 65 Claims.

Michael Hacskaylo, of Falls Church. Automatic human body detector. No. 4,500,784. 4 Claims.

Charles E. Konrad, of Roanoke; Ronald E. Gareis, and Amratlal C. Lodhie, both of Charlottesville. Dual motor proportioning control. No. 4,500,818. 6 Claims.

Hubert A. Miller, of Manassas. Dial pulse measurement circuitry. No. 4,501,003. 6 Claims.

John E. Comparetto, of Nassawadox. Bone wedge guidance system. No. 4,501,268. 20 Claims.

Stephen B. Bogese II, of Salem. Modular connector with improved housing and contact structure. No. 4,501,464. 12 Claims.

Joseph J. Crane, of Woodbridge, and Daniel T. Beasley, of Springfield. Scanning system employing a laser beam. No. 4,501,467. 13 Claims.

Philip W. Cathell, of Richmond. Elongated wand-type wind-up and trigger-released separable actuator for motorized toy. No. 4,501,567. 8 Claims.

Robert J. Crescenzi, of Forest; John U. Daniels Jr., and Gerald E. Roberts, both of Lynchburg. Piezoelectric crystal electrodes and method of manufacture. No. 4,477,952. 3 Claims.

William B. Inskeep, of Culpeper. Dual implement hitch. No. 4,478,032. 17 Claims.

Allan J. Zuckerwar, of Newport News. Flow resistivity instrument in the earth. No. 4,478,069. 6 Claims.

Charles C. Chapin, of Woodbridge; James H. Conley, of Fredericksburg, and Robert G. Jamison, of Glen Burnie, Md. Method for regenerating hydraulic systems. No. 4,478,235. 12 Claims.

James W. Maddox, of Newport News, and David D. Berger, of Alexandria. Condensate removal device. No. 4,478,238. 3 Claims.

Dan D. Baldwin, of Independence. Apparatus and method for exercising the abductor or adductor muscles. No. 4,478,411. 5 Claims.

Benjamin F. Sherman Jr., of McLean. Three-dimensional sliding element puzzle. No. 4,478,418. 2 Claims.

John DeLigt, of Covington. Veneer finishing machine. No. 4,478,609. 1 Claim.

Robert P. Broadwater, of Lynchburg. Nuclear power plant feedwater controller design. No. 4,478,783. 4 Claims.

Alan D. Berry, of Springfield. Low temperature deposition of nickel films. No. 4,478,890. 21 Claims.

Yoram Houminer, of Richmond, and Harvey J. Grubbs, of Mechanicsville. Heterocycle-hydroxy-substituted carboxylate esters. No. 4,479,003. 5 Claims.

H. Keith Kidd, of Christianburg, and Philip S. Coulon Jr., of Radford. Brushless motor controller. No. 4,479,078. 10 Claims.

Joe C. Lambert, of Charlottesville. Electrical braking control for DC motors. No. 4,479,080. 9 Claims.

Samuel C. Harris, of Waynesboro. Step motor drive. No. 4,479,081. 15 Claims.

Ernest M. Rossini, of Springfield. Method of and apparatus for feeding and positioning material to be scanned. No. 4,479,147. 17 Claims.

Karl E. Balliet, of Bedford. Athletic padding. No. 4,479,269. 15 Claims.

Donald C. Schluderberg, of Lynchburg. Moving bed heat storage and recovery system. No. 4,479,353. 6 Claims.

Alexander Malkhoff, of Arlington. Method and system for determining effect of underwater explosion on submerged structures. No. 4,479,378. 3 Claims.

Werner H. Mailer, and Henry C. Sipe, both of Waynesboro. Friction feed tractor. No. 4,479,598. 14 Claims.

Fred E. Thompson, of Quinton. Plastic coated laminate. No. 4,479,991. 11 Claims.

Richard M. Berg, of Stafford. Wide band energy absorbing camouflage blanket. No. 4,479,994. 9 Claims.

Young S. Leo, of Richmond, and Chandler R. Taylor, of Mechanicsville. (2-) (nitropyridinyl) amino) phenyl) arymethanones. No. 4,480,100. 10 Claims.

William M. Drangininis, of Manassas. Headlights for streamlined vehicles. No. 4,480,291. 15 Claims. Virginia: Design Patents

Howard M. Carey Jr.; and Clemens A. Iten, both of Staunton, et al. Packaging card for disposable safety razors. No. D 275,737.

Dwight C. Brown, of Arlington. Retainer accessory for a garment hanger. No. D 275,826.

Paul R. Fayle, of Lexington. Sliding door and window lock. No. D 276,131.

Robert R. Huntington, of Lynchburg. Portable radio transceiver or the like. No. D 276,159.

Clemens A. Iten, of Staunton. Holder for disposable safety razor. No. D 277,434.

Robert R. Huntington, and Henry A. Schaefer, both of Lynchburg. No. D 277,662.

Mario F. Ruffino, of Hampton. Rear gunsight. No. D 277,774.