After 2 1/2 years of research and development, Ronald D. Stouffer, vice president of engineering at Bowles Fluidics Corp. in Silver Spring, has received U.S. Patent No. 4,210,283 on a Dual Pattern Windshield Nozzle. The device is located at the bottom of and between pairs of windshield wipers to which it supplies a steady stream of pressurized fluid.

According to Julian Lazrus, president of Bowles, the company is now negotiating with automobile manufacturers to place this invention on cars after approximately one to two years of additional research. For technical reasons, it is not practical for the device to be retailed to the public for installation on cars already on the market.

The corporation already owns 100 to 150 other patents and its engineering staff is busy working on other improved inventions which it hopes to patent. The company has 60 people on its payroll.

Patents granted recently to residents of Maryland, Virginia and the District: MARYLAND

Alston C. Sandy of Laurel. Container and Lip Attachment. Patent No. 4,197,445. 5 claims.

Jacob Rabinow of Bethesda. Sound or Vibration Operated Flash Synchronizer for Camera. Patent No. 4,199,241. 18 claims.

Billy F. Rankin of Rockville. Method for Imparting Freeze Stability to Chlorhexidine-Containing Medicaments. Patent No. 4,199,567. 4 claims. t

Leonard J. Schwee of Colesville, et al. Field Determined Cross-Tie Memory Propagation Circuit. Patent No. 4,199,819. 2 claims.

Arnold G. Thalhamer of Waldorf. Pneumatic Valve. Patent No. 4,199,006.

Ronald F. Nax of Columbia. Continuously Rotating Cat Scanning Apparatus and Method. Patent No. 4,200,797. 38 claims.

Richard A. Chase of Baltimore, et al. (design patent). Combined Grasping and Handling Toy Rattle or Similar Article. Patent No. D 254,860. For a term of 14 years.

Samuel Kaufman of Hagerstown. Underdrain for Filter Tanks. Patent No. 4,200,536.

Richard A. Knazek of Bethesda, et al. Method of Cell Culture Using a Dualcircuit, Woven Artificial Capillary Bundle. Patent No. 4,200,689 5 claims.

Joseph E. Matta of Bel Air, et al. Ventilation System for Automated Mailing Machines. Patent No. 4,200,036. 3 claims.

Manley McGill of Wheaton. Method of Storing Physiological Material. Patent No. 4,199,954. 5 claims.

Joseph E. Adkinson of Chevy Chase. Design patent for cocktail table. Patent No. D 254,884. For 14 years.

Richard N. Bennett of Arbutus and Albert Lichas of Baltimore. Anti-Spilling Safety Device for High-Speed Filling Machines. Patent No. 4,201,254. 8 claims.

John P. Connors of Silver Spring, et al. Digital To Analog Interference For Simultaneous Antalog Outputs. Patent No. 4,202,042. 1 claim.

Raymond C. Elton of Potomac and Robert H. Dixon of Bowie. Method of Producing Population Inversion and Lasing at Short Wavelengths by Charge Transfer. Patent No. 4,201,955. 16 claims.

Henry L. Feldman of Ellicott City, et al. Therapeutic Heat Application. Patent. No. 4,201,218. 5 claims.

Steven J. Fitch of Baltimore and Charles A. Tanner of Severna Park. Process for Quenching of Fine Particulates. Patent No. 4,201,570.

Edmund M. Glaser of Baltimore, et al. Computer Microscope Apparatus and Method for Superimposing an Electronically Produced Image from the Computer Memory Upon the Image in the Microscope's Field of View. Patent No. 4,202,037. 29 claims.

Joseph Lindmayer of Bethesda. Method of Applying an Antireflective Coating to a Solar Cell. Patent No. 4,201,796. 8 claims.

T. Garrett Robinson of Galena. Device for Increasing Efficiency of Fuel. Patent No. 4,201,140. 19 claims.

William G. Schmidt of Gaithersburg. Multi-Rate TDMA Communication System. Patent No. 4,201,892. 12 claims.

Clarence Williams of Baltimore. Martial Arts Practice Bag. Patent No. 4,201,379.

David A. Carpenter of Parkton, Integral Torquer For Mass Measurement System. Patent No. 4,202,205. 10 claims.

Richard F. Maxwell, Jr. of Baltimore. Two Tone Tracker. Patent No. 4,202,515. 6 claims.

Thomas F. Nicholson Jr. of Baltimore. Level Layer Winding Method and Apparatus. Patent No. 4,202,512. 8 claims.

M. Robert Reitz of Annapolis. International Code Flag Education Game. Patent No. 4,202,548. 3 claims. Virginia

John P. Latimer of Newport News. Pivotable Means for Decreasing Drag Effects on a Generally Cylindrical Dredge Pipe. Patent No. 4,200,999. 16 claims.

Mokhtar S. Maklad and Pablo C. Pureza of Roanoke. Apparatus and Method of Coating Filaments With Polymers. Patent No. 4,201,151-. 12 claims.

Kenneth Owen of Springfield. Power Actuator for Coaxial R F Power Switch. Patent No. 4,201,899. 16 claims.

James H. Burbo and Louis P. Hartmen both of Roanoke. Training Aid For Use With Night Vision Apparatus. Patent No. 4,202,601. 14 claims.

Parhta S. Chaudhuri of Covington. Automatically Controlled Machine for Making Double-Faced, Polymer Plastic Coated Corrugated Paperboard. Patent No. 4,202,723. 3 claims.

John J. Doherty of Fairfax. Submarine Communication. Patent No. 4,203,160. 3 claims.

Joseph F. Hannigan of Springfield. Zero-Doppler Shift Positioning Technique. Patent No. 4,203,115. 9 claims.

Robert H. Twyford of Springfield. Electric Switch Utilizing Coil Spring Torsion Biasing in Switch Operation. Patent No. 4,203,016. 19 claims.

Claim: Defines the invention and sets the bounds of the monopoly asserted by the inventor.