Inventor

CHAPMAN ROBERT A

US7 patents

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

APPLIED MATERIALS INC

3 patents

US5536330AJul 16, 1996

Method of purging and pumping vacuum chamber to ultra-high vacuum

APPLIED MATERIALS INC57 citations95

US5759287AJun 2, 1998

Method of purging and passivating a semiconductor processing chamber

APPLIED MATERIALS INC33 citations92

US5830808ANov 3, 1998

Plasma reactor with magnet for protecting an electroacoustic chuck from the plasma

APPLIED MATERIALS INC18 citations91

(unassigned)

1 patent

US5484485AJan 16, 1996

Plasma reactor with magnet for protecting an electrostatic chuck from the plasma

23 citations90

DOULTON ROMM

1 patent

US4512667AApr 23, 1985

Portable information device having an output related to natural physical events

DOULTON ROMM71 citations88

RACAL GROUP SERVICES LTD

1 patent

US4206414AJun 3, 1980

Electrical synchronizing circuits

RACAL GROUP SERVICES LTD22 citations79

RACAL GROUP SERVICE LTD

1 patent

US4131856ADec 26, 1978

Electrical synchronizing circuits

RACAL GROUP SERVICE LTD19 citations79