Inventor · disambiguated record
Ryoji Takamatsu
Also filed as: TAKAMATSU RYOJI
11 granted patents·184 citations·filing 1976–1998
90Inventor score
Files withSONY CORP11
Top patents by PatentIndex Score
11 records- 0190US4731777AOptical disk playerSONY CORP·Filed 1985·Granted Mar 15, 1988·55 cites·7 claims
- 0284US4794588AOptical disk playerSONY CORP·Filed 1987·Granted Dec 27, 1988·43 cites·3 claims
- 0379US4628498ADisc loading apparatus for use in a disc playerSONY CORP·Filed 1985·Granted Dec 9, 1986·30 cites·6 claims
- 0462US4638386AOperation changing mechanism responsive to direction change of a reversible motorSONY CORP·Filed 1983·Granted Jan 20, 1987·12 cites·3 claims
- 0561US5063557ADisc drive apparatusSONY CORP·Filed 1989·Granted Nov 5, 1991·13 cites·17 claims
- 0653US4527210AMode selecting mechanism for magnetic tape recording and/or reproducing apparatusSONY CORP·Filed 1982·Granted Jul 2, 1985·8 cites·25 claims
- 0750US6493308B2Disc recording/reproducing apparatus and disc container casing used thereinSONY CORP·Filed 1998·Granted Dec 10, 2002·10 cites·42 claims
- 0844US5586103ADisc player with an automatic disc charger including eject locking mechanism and movable chassis holding mechanismSONY CORP·Filed 1995·Granted Dec 17, 1996·7 cites·8 claims
- 0936US5481513ADisc changing apparatus for disc player including improved translating chassis and eject mechanism for disc magazineSONY CORP·Filed 1993·Granted Jan 2, 1996·4 cites·3 claims
- 1035US4101946ATape playing machine with movable head mountSONY CORP·Filed 1976·Granted Jul 18, 1978·2 cites·9 claims
- 1129US6128156ADevice for driving tape-like recording mediumSONY CORP·Filed 1997·Granted Oct 3, 2000·0 cites·16 claims
Join the waitlist — get patent alerts
Get an alert when Ryoji Takamatsu files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →