Multiple Cylinder Patents (Class 123/52.1)
- Locked pistons (Class 123/58.2)
- Lengthwise charging (Class 123/58.4)
- Step piston (Class 123/58.6)
- Cylinder supercharged by pressure pulse of released exhaust gases (Class 123/58.7)
- Exhaust to next cylinder ready to fire (Class 123/58.8)
- Oscillating or reciprocating, nonpoppet valve (Class 123/58.9)
- Rotary valve (Class 123/59.1)
- Plural carburetors (Class 123/59.5)
- Multiple crankshafts (Class 123/59.6)
- Two-stroke cycle (Class 123/59.7)