Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
MI

Masaru Ikebe

Tdk: 63 patents #29 of 3,796Top 1%
KTKabushiki Kaisha Toshiba: 1 patents #13,537 of 21,451Top 65%
TATdk Electronics Ag: 1 patents #234 of 503Top 50%
Overall (All Time): #34,984 of 4,157,543Top 1%
64 Patents All Time

Issued Patents All Time

Showing 51–64 of 64 patents

Patent #TitleCo-InventorsDate
5034844 Disc cartridge with bent shutter plate to facilitate mounting of shutter plate on disc casing Haruo Shiba 1991-07-23
5018039 Disc cartridge with thick portion surrounding head insertion hole Haruo Shiba, Morimasa Sasaki 1991-05-21
5010435 Hub for a disk type recording medium Haruo Shiba, Toshihiko Ishida 1991-04-23
4991048 Disc cartridge casing with shutter slidably fitted therein to uncover a pick-inserting hole Haruo Shiba 1991-02-05
4979065 Disc cartridge having a liner and an elastic member for maintaining the liner in contact with a disc Haruo Shiba, Kimio Tanaka, Kenkichi Akaoka 1990-12-18
4977475 Lining member for the surface of a casing for a disc cartridge Haruo Shiba 1990-12-11
D311002 Magnetic tape cassette Takateru Satoh, Kimio Tanaka 1990-10-02
4905113 Magnetic tape cassette having a slider mounted on the lower casing member Haruo Shiba, Takateru Satoh, Morimasa Sasaki 1990-02-27
4899242 Locking mechanism of magnetic tape cassette Kenji Hashizume, Masatoshi Okamura, Haruo Shiba 1990-02-06
4865265 Magnetic tape cassette Kenji Hashizume, Masatoshi Okamura 1989-09-12
4862448 Disc cartridge and casing therefor Kimio Tanaka, Morimasa Sasaki 1989-08-29
4847717 Handling of a tape cassette Takateru Satoh, Haruo Shiba 1989-07-11
4747007 Spring means for biasing a tape against a head inserted in a cassette Kimio Tanaka, Takateru Satoh, Haruo Shiba 1988-05-24
4671469 Tape cassette Takateru Satoh, Kimio Tanaka 1987-06-09