P

Inventor

LONGMAN ROBERT J

GB9 patents
⚠️ This page may combine multiple inventors who share the name “LONGMAN ROBERT J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

PLASMON DATA SYSTEMS INC

4 patents
US4724444AFeb 9, 1988

Data storage medium

PLASMON DATA SYSTEMS INC7 citations72
US4866696ASep 12, 1989

Pre-formatted moth-eye type optical data storage member and method

PLASMON DATA SYSTEMS INC10 citations69
US5137617AAug 11, 1992

Optical disk manufacture

PLASMON DATA SYSTEMS INC8 citations68
US5406540AApr 11, 1995

Optical disk recording performance

PLASMON DATA SYSTEMS INC15 citations67

PLASMON DATA SYSTEMS P V

1 patent
US4703469AOct 27, 1987

Optical data recording using radiation of different characteristics

PLASMON DATA SYSTEMS P V39 citations89

PLASMON DATA SYSTEMS

1 patent
US4928132AMay 22, 1990

Optical data storage medium

PLASMON DATA SYSTEMS14 citations77

HEIDENHAIN GMBH DR JOHANNES

1 patent
US4657780AApr 14, 1987

Manufacture of diffraction gratings

HEIDENHAIN GMBH DR JOHANNES17 citations73

PLASMON LTD

1 patent
US5008687AApr 16, 1991

Data storage medium

PLASMON LTD10 citations68

PLASMON DATA SYSTEMS NV

1 patent
US4802736AFeb 7, 1989

Interferometers

PLASMON DATA SYSTEMS NV2 citations59