Inventor · disambiguated record
Yuji Iwahashi
Also filed as: IWAHASHI YUJI
20 granted patents·2 pending applications·200 citations·filing 1987–2022
94Inventor score
Top patents by PatentIndex Score
22 records- 0185US5405007ATape cassette case made by a dichromatic mannerSONY CORP·Filed 1994·Granted Apr 11, 1995·37 cites·10 claims
- 0284US5007596ATape cassette reel having an upper reel molded by dichromatic molding processSONY CORP·Filed 1989·Granted Apr 16, 1991·29 cites·4 claims
- 0378US4807826ATape reel for tape cassetteSONY CORP·Filed 1987·Granted Feb 28, 1989·23 cites·26 claims
- 0476US4901171AOptical tape end sensing arrangement for magnetic tape cassetteSONY CORP·Filed 1988·Granted Feb 13, 1990·11 cites·29 claims
- 0574US4773614ATape cassetteSONY CORP·Filed 1987·Granted Sep 27, 1988·19 cites·2 claims
- 0659US4903915ATape cassette having means for locking reels thereofSONY CORP·Filed 1989·Granted Feb 27, 1990·11 cites·8 claims
- 0757US5506739ATape cassette with slidably guided, spring-biased reel locking meansSONY CORP·Filed 1994·Granted Apr 9, 1996·11 cites·7 claims
- 0856US12347457B2Cartridge including magnetic tape including magnetic layer including protrusions on surface thereofSONY GROUP CORP·Filed 2022·Granted Jul 1, 2025·0 cites·13 claims
- 0956US5174520ATape cassette reel having an upper reel portion formed by dichromatic molding methodSONY CORP·Filed 1989·Granted Dec 29, 1992·10 cites·8 claims
- 1055US5422773ALid assembly for a tape cassette which protects front and rear surfaces of a magnetic tapeSONY CORP·Filed 1994·Granted Jun 6, 1995·10 cites·13 claims
- 1150US5407145ATape cassette having an improved lid/sub lid structureSONY CORP·Filed 1993·Granted Apr 18, 1995·8 cites·7 claims
- 1248US5255144ABrake device for tape reel in magnetic tape cassetteSONY CORP·Filed 1992·Granted Oct 19, 1993·7 cites·18 claims
- 1346US12068005B2Tape reel and tape cartridgeSONY GROUP CORP·Filed 2020·Granted Aug 20, 2024·0 cites·16 claims
- 1444US11217278B2Tape cartridge including reel lock memberSONY CORP·Filed 2019·Granted Jan 4, 2022·0 cites·11 claims
- 1544US5075810ATape cassette with sealed light apertureSONY CORP·Filed 1991·Granted Dec 24, 1991·6 cites·2 claims
- 1643US2023249941A1Tape cartridge, tape reel, and method of producing reel hubSONY GROUP CORP·Filed 2021·Application pending·0 cites
- 1741US4945440ATape cassette with transparent reel viewing windows and laminated three-color constructionSONY CORP·Filed 1988·Granted Jul 31, 1990·9 cites·1 claims
- 1841US2024170020A1Tape cartridge, method of producing tape cartridge, and tape reelSONY GROUP CORP·Filed 2022·Application pending·0 cites
- 1939US5170962ATape cassette with lid assembly which, in a closed position, protects front and rear surfaces of a tape run extending across a recess at the front of the cassetteSONY CORP·Filed 1991·Granted Dec 15, 1992·4 cites·3 claims
- 2037US11282542B2Tape cartridge with reel lock release member having gradually decreasing thickness extension portionsSONY CORP·Filed 2019·Granted Mar 22, 2022·0 cites·10 claims
- 2137US4893766ATape cassette having a front lid and a back lidSONY CORP·Filed 1988·Granted Jan 16, 1990·5 cites·4 claims
- 2234US9704530B2Magnetic tape cartridgeSONY CORP·Filed 2015·Granted Jul 11, 2017·0 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →