Inventor
OZEKI EIJI
JP7 patents
⚠️ This page may combine multiple inventors who share the name “OZEKI EIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NGK SPARK PLUG CO
6 patentsUS4556814ADec 3, 1985
Piezoelectric ultrasonic transducer with porous plastic housing
NGK SPARK PLUG CO75 citations94
US4755975AJul 5, 1988
Piezoelectric transducer for transmitting or receiving ultrasonic waves
NGK SPARK PLUG CO31 citations91
US5057802AOct 15, 1991
Ladder-type electric filter apparatus and housing therefor
NGK SPARK PLUG CO11 citations72
US5920242AJul 6, 1999
Multielement-type piezoelectric filter with through-hole connection of resonators to a base substrate circuit
NGK SPARK PLUG CO12 citations68
US6225877B1May 1, 2001
Multilayer type piezoelectric filter with intermediary printed circuit board elements
NGK SPARK PLUG CO6 citations62
US5717366AFeb 10, 1998
Ladder type piezoelectric filter including conductive rubber plates
NGK SPARK PLUG CO4 citations61