Inventor
SUGIYAMA KEIICHI
29 patents
⚠️ This page may combine multiple inventors who share the name “SUGIYAMA KEIICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
YAMAHA MOTOR CO LTD
14 patentsUS4512311AApr 23, 1985
Intake control system for multi-valve type internal combustion engine
YAMAHA MOTOR CO LTD23 citations82
US4194477AMar 25, 1980
Device for admission of secondary air to internal combustion engine intake
YAMAHA MOTOR CO LTD22 citations82
US4726340AFeb 23, 1988
Intake system for multi-cylinder engine
YAMAHA MOTOR CO LTD15 citations74
US4576131AMar 18, 1986
Intake control system for multi-valve type internal combustion engine
YAMAHA MOTOR CO LTD10 citations74
US4567860AFeb 4, 1986
Intake system for multiple cylinder engines
YAMAHA MOTOR CO LTD11 citations74
US4414953ANov 15, 1983
Internal combustion engine with exhaust gas recycling system
YAMAHA MOTOR CO LTD6 citations74
US4381749AMay 3, 1983
Intake device for engine
YAMAHA MOTOR CO LTD10 citations74
US4306533ADec 22, 1981
Internal combustion engine with exhaust gas recycling system
YAMAHA MOTOR CO LTD6 citations74
US4232640ANov 11, 1980
Induction system for an internal combustion engine
YAMAHA MOTOR CO LTD17 citations74
US4231339ANov 4, 1980
Control device for exhaust gas recycled internal combustion engine
YAMAHA MOTOR CO LTD12 citations74
US4292944AOct 6, 1981
Intake control system for internal combustion engine
YAMAHA MOTOR CO LTD9 citations73
US4727829AMar 1, 1988
Intake system for internal combustion engine
YAMAHA MOTOR CO LTD18 citations71
US4660530AApr 28, 1987
Intake system for internal combustion engine
YAMAHA MOTOR CO LTD14 citations71
US4237828ADec 9, 1980
Method of controlling an internal combustion engine
YAMAHA MOTOR CO LTD4 citations63