David W. Ferguson

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Pickerington, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Systems, methods, and apparatus for isometric, isokinetic, isotonic...
- Patent number 11,260,268
- Issue date Mar 1, 2022
- MD Systems, Inc.
- Michael A. Smyser
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Systems, methods, and apparatus for isometric, isokinetic, isotonic...
- Patent number 10,603,542
- Issue date Mar 31, 2020
- MD Systems, Inc.
- Michael A. Smyser
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Apparatus, system, and method for carrying out protocol-based isome...
- Patent number 5,904,639
- Issue date May 18, 1999
- MD Systems
- Michael A. Smyser
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Isometric exercise apparatus
- Patent number D403385
- Issue date Dec 29, 1998
- MD Systems
- Michael A. Smyser
- D21 - Games, toys, and sports goods