Occupant Propelled Type Patents (Class 280/200)
- Steering by driving (Class 280/211)
- Added or stored energy device (Class 280/212)
- Inching or step-by-step (Class 280/218)
- Intermittent ground engaging drive (Class 280/219)
- Movable occupant support (Class 280/220)
- Plural power application (Class 280/230)
- Reversing and power ratio change (Class 280/236)
- Three tandem wheels (Class 280/239)
- Interconnected steering means (Class 280/240)
- Intermittent gripped belt or chain (Class 280/241)
- Hand propelled (Class 280/242.1)
- Strap, drum, and ratchet (Class 280/251)
- Reciprocating power application (Class 280/252)
- Oscillating lever (Class 280/253)
- Rotary crank power (Class 280/259)
- Occupant body harness (Class 280/290)
- Steps and foot rests (Class 280/291)
- Towing attachments (Class 280/292)
- Props and steadying devices (Class 280/293)
- Wheelchair (Class 280/304.1)
- Wheel driven (Class 280/304.2)
- Guards and reinforcements (Class 280/304.3)
- Handling and carrying attachments (Class 280/304.5)