Inventor

JOHNSTON WILLIAM J

5 patents

⚠️ This page may combine multiple inventors who share the name “JOHNSTON WILLIAM J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

GEN MOTORS CORP

2 patents

US4364761ADec 21, 1982

Ceramic filters for diesel exhaust particulates and methods for making

GEN MOTORS CORP127 citations93

US4231342ANov 4, 1980

Diesel fuel heat recovery system and control valve therefor

GEN MOTORS CORP28 citations78

DELCO ELECTRONICS CORP

2 patents

US5489842AFeb 6, 1996

Method and apparatus for determining the rotational position of a magnetic rotor relative to current carrying coils utilizing magnetic coupling between coils

DELCO ELECTRONICS CORP5 citations62

US5347213ASep 13, 1994

Air core gauge method and apparatus with reduced power dissipation

DELCO ELECTRONICS CORP3 citations55

CHEVRON USA INC

1 patent

US7124906B2Oct 24, 2006

Apparatus and method for protecting floating roof tanks from the effects of lightning strikes

CHEVRON USA INC3 citations52