David S. Douglass

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Mesa, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Automatic transmission for bicycles
- Patent number 5,303,605
- Issue date Apr 19, 1994
- Automatic Bicycle Co.
- David S. Douglass
- B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
Information Patent Grant
Automatic transmission with free-wheeling drive shaft
- Patent number 5,099,712
- Issue date Mar 31, 1992
- David S. Douglass
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...