Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4933081 | Asymmetric micro-porous membrane containing a layer of minimum size pores below the surface thereof | Jun Sasaki | 1990-06-12 |
| 4876007 | Plate-type filter cartridge with internal support | Sumio Ohtani, Masahiro Etoh, Masao Tsuruta, Ikuro Moriya, Masanori Ishiguro +1 more | 1989-10-24 |
| 4871456 | Stacked filter cartridge with porous filter support | Sumio Ohtani, Masahiro Etoh, Ikuro Moriya | 1989-10-03 |
| 4840733 | Fine porous membrane and process for producing the same | Jun Sasaki, Atsushi Adachi, Yukio Shinagawa, Sumio Ohtani | 1989-06-20 |
| 4837127 | Recording medium | Shinichiro Ohara | 1989-06-06 |
| 4686543 | Information recording medium | Yoshio Tani, Masao Yabe | 1987-08-11 |
| 4657817 | Magnetic recording material | Tsutomu Okita, Nobuo Tsuji, Teruo Nakagawa, Kiyoshi Murase, Takahisa Ogasawara | 1987-04-14 |
| 4656118 | Information recording medium using laser beam | Shinichiro Ohara, Yohnosuke Takahashi, Fumiaki Shinozaki | 1987-04-07 |
| 4619868 | Magnetic recording medium | Tsutomu Okita, Hiroshi Hashimoto | 1986-10-28 |
| 4616238 | Information recording medium of air-sandwich structure | Yoshio Tani, Masao Yabe | 1986-10-07 |
| 4607264 | Recording medium of deformable air-sandwich structure | Yoshio Tani | 1986-08-19 |
| 4560616 | Magnetic recording medium having binder cured by electron beam radiation | Tsutomu Okita, Hiroshi Hashimoto | 1985-12-24 |
| 4557948 | Process for producing magnetic recording materials | Nobuyuki Yamamoto, Masao Yabe, Yasuo Nishikawa, Akio Yanai, Ryuji Shirahata | 1985-12-10 |
| 4520070 | Magnetic recording medium and process for producing same | Nobuyuki Yamamoto, Yasuo Nishikawa, Tsutomu Okita | 1985-05-28 |
| 4518656 | Magnetic recording medium and process for producing the same | Tsutomu Okita | 1985-05-21 |
| 4499043 | Process for producing a cellulose ester support | Masao Yabe, Kazuhiro Ono | 1985-02-12 |
| 4486500 | Magnetic recording medium | Nobuyuki Yamamoto, Tsutomu Okita | 1984-12-04 |
| 4482610 | Magnetic recording medium and process for producing the same | Tsutomu Okita | 1984-11-13 |
| 4448848 | Magnetic recording medium and process for producing the same | Tsutomu Okita | 1984-05-15 |
| 4443514 | Magnetic recording medium | Nobuyuki Yamamoto, Yasuo Nishikawa, Yuji Andou, Tsutomu Okita | 1984-04-17 |
| 4428974 | Process for producing magnetic recording material | Tsutomu Okita, Akira Ushimaru | 1984-01-31 |
| 4407853 | Process for producing a magnetic recording medium | Tsutomu Okita, Goro Akashi | 1983-10-04 |
| 4391874 | Magnetic recording medium | Nobuyuki Yamamoto, Tsutomu Okita | 1983-07-05 |
| 4340663 | Photographic film | Akikazu Mikawa | 1982-07-20 |
| 4324705 | Process for recovering materials from scrapped film | Kunihira Seto | 1982-04-13 |