P

Inventor

KRAMER PIETER

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

PHILIPS CORP

6 patents
US4223347ASep 16, 1980

Videodisc with undulating nested tracks

PHILIPS CORP36 citations92
US4041530AAug 9, 1977

Video disc with phase structure

PHILIPS CORP46 citations88
US5068846ANov 26, 1991

Reflective optical record carrier

PHILIPS CORP19 citations72
US4160269AJul 3, 1979

Apparatus for optically reading a phase-modulated optical record carrier

PHILIPS CORP14 citations68
US4962493AOct 9, 1990

Record carrier with a follow-on track and apparatus for recording information thereon

PHILIPS CORP3 citations61
US4807209AFeb 21, 1989

Record carrier body with a follow-on track and apparatus for recording information thereon

PHILIPS CORP4 citations61

DIAMANT BOART SA

2 patents
US4428602AJan 31, 1984

Inner tube element for a double tube coring apparatus and process for the manufacture of this tube element

DIAMANT BOART SA29 citations87
US4569710AFeb 11, 1986

Process for manufacturing the inner tube element for a double tube coring apparatus

DIAMANT BOART SA24 citations78