Inventor
MATSUI MASAHIKO
JP7 patents
⚠️ This page may combine multiple inventors who share the name “MATSUI MASAHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
4 patentsUS4844377AJul 4, 1989
Tape cassette
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD25 citations91
US4803575AFeb 7, 1989
Tape cassettes having bottom grooves for use in tape recorder having bottom projection in cassette holder
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD31 citations91
US4809113AFeb 28, 1989
Tape cassette with improved cover structure
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations72
US4811121AMar 7, 1989
Magnetic recording and reproducing system using preceding and lagging groups of rotary heads to permit coincident timing for reproduced video and audio signals
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD4 citations61
SUMITOMO ELECTRIC INDUSTRIES
3 patentsUS7773847B2Aug 10, 2010
Multimode optical fiber
SUMITOMO ELECTRIC INDUSTRIES7 citations72
US7164829B2Jan 16, 2007
Optical fiber, optical transmission line and optical communications system
SUMITOMO ELECTRIC INDUSTRIES2 citations61
US6449986B2Sep 17, 2002
Method of production of porous glass base material for optical fiber with cleaning of the burner with gas at 25 m/s or faster
SUMITOMO ELECTRIC INDUSTRIES2 citations57