P

Inventor

OLSON RICHARD A

US15 patents
⚠️ This page may combine multiple inventors who share the name “OLSON RICHARD A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NL INDUSTRIES INC

4 patents
US4602794AJul 29, 1986

Annular blowout preventer with upper and lower spherical sealing surfaces and rigid translation element

NL INDUSTRIES INC22 citations81
US4283039AAug 11, 1981

Annular blowout preventer with upper and lower spherical sealing surfaces

NL INDUSTRIES INC21 citations81
US4460149AJul 17, 1984

Annular blowout preventer with upper and lower spherical sealing surfaces

NL INDUSTRIES INC16 citations73
US4438900AMar 27, 1984

Locking mechanism for annular blowout preventer

NL INDUSTRIES INC19 citations73

(unassigned)

2 patents
US5399806AMar 21, 1995

Modular electrical wiring system

168 citations98
US5374217ADec 20, 1994

Illusion creating for amusement and education

19 citations81

OLSON RICHARD A

2 patents
US5011475AApr 30, 1991

Protector for intravenous and syringe needles

OLSON RICHARD A157 citations97
US3960327AJun 1, 1976

Lawn sprinkler programmer

OLSON RICHARD A19 citations72

HYDRIL CO

2 patents
US4290577ASep 22, 1981

Blowout preventer ram lock

HYDRIL CO50 citations92
US4076208AFeb 28, 1978

Blowout preventer ram lock

HYDRIL CO50 citations92

STEWART & STEVENSON SERV INC

1 patent
US6089526AJul 18, 2000

Ram type blowout preventor

STEWART & STEVENSON SERV INC61 citations96

COOPER CAMERON CORP

1 patent
US5653418AAug 5, 1997

Ram-type blowout preventer

COOPER CAMERON CORP50 citations92

KOHLER CO

1 patent
US6662503B2Dec 16, 2003

Bathing enclosure wall panel

KOHLER CO25 citations89

GENCORP INC

1 patent
US5593157AJan 14, 1997

Long life, low air permeable pressurized articles such as play balls

GENCORP INC32 citations86

DU PONT

1 patent
US4721661AJan 26, 1988

Selectively removing unwanted magnetic toner from magnetic member to provide uniform high resolution image

DU PONT3 citations54