Design & Funding Inc., whose home office and research department is in Baltimore, is the sole manufacturer and distributor of the Aqua-Flo Conditioner, a water conditioner that has been tested and proven to be as much as 40 percent more efficient than any other conditioner now on the market.

Aqua-Flo was invented by Bruce DePalma, 45, of California, an MIT graduate who has a Ph.D. in physics and many years of research and experience in the field of magnetic forces and water conditioners.

DePalma says his invention works on a principal that has long been known in the industry, but claims it never has been utilitzed in a device with the efficiency of Aqua-Flo. Design & Funding is producing Aqua-Flo for sale in the United States and later export.

Aqua-Flo not only will condition water, but also will ionize oil, gasoline and wine, according to an official of Design & Funding Inc. The device is installed in the inlet water line of a home, school, office building or manufacturing plant.

The marketers claim the device operates automatically, never needs to be cleaned and will last a lifetime. Additional patents are pending on Aqua-Flo, which can be manufactured in any desired size depending upon the amount of water it is to condition.

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

Richard F. Green of Bethesda and Kurt P. Scharnhorst of Columbia. Room Temperature Two Color Infrared Detector. Patent No. 4,224,520. 5 claims.

Pradman Kaul of Gaithersburg, et al. TDMA Multiplexer-Demultiplexer with Multiple Ports. Patent No. 4,224,473. 12 claims.

Delbert I. Liller of Deer Park. Construction of Shallow Dish with Tapered Orifice for Streamlined Flow Cyclone Washing of Crushed Coal. Patent No. 4,224,143. 16 claims.

Pedro B. Macedo of Bethesda, et al. Fixation of Radioactive Materials in a Glass Matrix. Patent No. 4,224,177. 22 claims.

Marr Sappington and John Katinsky of Hurlock. Apparatus for Feeding Poultry. Patent No. 4,223,638. 17 claims.

Thomas C. Blow of Takoma Park. Power Area Collocation of Transmitters. Patent No. 4,225,966. 8 claims.

Carroll M. Gantz of Baltimore, et al. Cordless Vacuum Cleaner Storing and Recharging System. Patent No. 4,255,814. 6 claims.

Harold A. Gell of Silver Spring. Orientation System. Patent No. 4,255,867. 16 claims.

Glen D. Larsen of Upper Marlboro. Cup-Shaped Bolster Bearing. Patent No. 4,224,876. 5 claims.

Kenneth C. Litt of Silver Spring and Alexander J. Vella of Derwood. Desolderer and Heater Assembly for Use Therewith. Patent No. 4,225,076. d16 claims.

Dieter R. Lohrmann of Lanham. Multislot Bicone Antenna. Patent No. 4,225,869. 9 claims.

Harvey M. Masters of Ellicott City. Automatic Synchronizing System for Digital Asynchronous Communications. Patent No. 4,225,960. 8 claims.

Douglas R. Price of Ruxton. Method and Apparatus for Navigating Unmarked Channels. Patent No. 4,255,949. 20 claims.

William J. Siegel of Silver Spring and Gerald J. Ferguson Jr. of Upper Marlboro. Circuitry for Teaching Soldering and Practice Circuit Board for Use Therewith. Patent No. 4,224,828. 13 claims.

Walter A. Steinke of Edgewood. Non-Spill Gas-Liquid Contact Unit. Patent No. 4,224,828. 13 claims.

Maurice H. Tremblay, Robert E. Manning, Gerard Lanoue and Frank Gaiteri Jr., all of Cockeysville. Core Spun Filtration Roving. Patent No. 4,522,442. 12 claims. VIRGINIA

Edward J. Page of Hampton. Storm Window. Patent No. 4,223,481. 8 claims.

John A. Whitley and Lacy A. Rowe of Salem. Mailbox with Improved Door Opening Means and Flag Opeator. Patent No. 4,223,828. 18 claims.

Peter P. Urik of Woodford. Locking Tong for Handling Fuel. Patent No. 4,223,933. 9 claims.

William L. Elliott of Millwood. Drill Bit. Patent No. 4,225,275. 5 claims.

Frank Emblidge of Herndon. Pruning Tool with Flexible Headpole Connection. Patent No. 4,224,739. 14 claims.

Marvin M. Lane of Arlington. Four Color Tomato Grader. Patent No. 4,225,242. 1 claim.

Richard Latter of Annandale. Reliable High Pressure Apparatus. Patent No. 4,225,300. 16 claims.

Peter W. Van Atta of Woodbridge and Max L. Harwell of Alexandria. Automatic Responsivity Compensator in an IR Imaging System. Patent No. 4,225,883. 7 claims.

Robert E. Weber of Newport News and Patrick D. Harper of Seaford. Inductive Driver Circuit Effecting Slow and Fast Current Decay. Patent No. 4,225,898. 10 claims.

Alexander J. Moncrieff-Yeates of Annandale. Room Air Recirculating Heater with Utility Compartments and Doors Storable Therewithin. Patent No. 4,224,922. 15 claims.

Rene S. Aramayo of Arlington. Catheter Attachment for Blood Sampling. Patent No. 4,230,128. 6 claims.

Graham Bretzgar of Staunton. Assembly for and Method of Making Mold and Casting of One-Piece Impellers. Patent No. 4,231,413. 13 claims.

Irving E. Figge and Edward H. Dean of Newport News. Prestressed Article. Patent No. 4,230,764. 1 claim.

Donald S. Gilpatric of Annandale. Apparatus for Growing Oysters and Other Mollusks. Patent No. 4,231,322. 15 claims.

Ernest J. Groome of Covington. Nip Roll for Treating Web Materials and Method of Manufacturing Same. Patent No. 4,230,036. 4 claims. DISTRICT OF COLUMBIA

Laurie F. Hess. Method of Repelling Insects by Systemic Action in Humans on Sulphur and Sulphur-Containing Substances. Patent No. 4,225,587. 16 claims.

Ralph L. Burnham. Electrically Excited Mercury Halide Laser. Patent No. 4,230,995. 7 claims.

Renald A. Cote. Orthopedic Device. Patent No. 4,230,103. 7 claims.

Mildred E. Smith. Family Relationship Card Game. Patent No. 4,230,321. 6 claims.

Claim: Defines the invention and sets forth the bounds of the property rights granted the inventor.

Copies of any of the above patents can be obtained from the Patent & Trade Mark Office for 50 cents each by addressing orders to the Commissioner of Patents and Trademarks, Washington, D.C. 20231 .