LandOfFree - US Patents - Listing for Internal-combustion engines,Four-cycle

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Parallel inherently balanced rotary valve internal combustion en

Internal-combustion engines – Four-cycle – Rotating valve

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Partitioned poppet valve mechanism seprating inlet and exhaust t

Internal-combustion engines – Four-cycle – Single poppet valve

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Piston and spring powered engine

Internal-combustion engines – Four-cycle – Variable clearance

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Piston engine

Internal-combustion engines – Four-cycle – Rear compression of air or combustible mixture to be...

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Piston-type internal combustion engine

Internal-combustion engines – Four-cycle – Variable clearance

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Piston-type internal combustion engine

Internal-combustion engines – Four-cycle – Variable clearance

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Poppet valve and engine using same

Internal-combustion engines – Four-cycle – Single poppet valve

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Poppet valve and engine using same

Internal-combustion engines – Four-cycle – Single poppet valve

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Poppet valve assembly with apertures

Internal-combustion engines – Four-cycle – Single poppet valve

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Pressure-responsive variable length connecting rod

Internal-combustion engines – Four-cycle – Variable clearance

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Process and apparatus for controlling a gas evacuation circuit o

Internal-combustion engines – Four-cycle – Rotating valve

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Pulse charger

Internal-combustion engines – Four-cycle – Crankcase compression of air or combustible mixture to be...

Patent

[ 2.20 ] – bad Voters 1 Comments 1

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