Richard D. Keller

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Takoma Park, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Cross-connectors for tubular members forming frameworks
- Patent number 6,123,482
- Issue date Sep 26, 2000
- Richard D. Keller
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Accessory device and mount for wheelchair
- Patent number 5,873,591
- Issue date Feb 23, 1999
- Richard D. Keller
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Cross-connectors for tubular members forming frameworks
- Patent number 5,797,697
- Issue date Aug 25, 1998
- Richard D. Keller
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Golf tee and ball setter
- Patent number 5,540,432
- Issue date Jul 30, 1996
- Richard D. Keller
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Squeeze-actuated medicinal fluid applicator
- Patent number 5,498,237
- Issue date Mar 12, 1996
- Richard D. Keller
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE