Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5688617 | Phase shift layer-containing photomask, and its production and correction | Koichi Mikami, Yoichi Takahashi, Hiroshi Fujita, Masa-aki Kurihara | 1997-11-18 |
| 5614335 | Blanks for halftone phase shift photomasks, halftone phase shift photomasks, and methods for fabricating them | Keiji Hashimoto, Junji Fujikawa, Hiroshi Mohri, Masahiro Takahashi, Yukio Iimura | 1997-03-25 |
| 5614336 | Phase shift layer-containing photomask, and its production and correction | Koichi Mikami, Yoichi Takahashi, Hiroshi Fujita, Masa-aki Kurihara | 1997-03-25 |
| 5604060 | Halftone phase shift photomask comprising a single layer of halftone light blocking and phase shifting | Sachiko Ishikita, Koichi Mikami | 1997-02-18 |
| 5576123 | Overlying shifter type phase shift photomask blank, overlying shifter type phase shift photomask and methods of producing them | Hiroshi Mohri | 1996-11-19 |
| 5561009 | Blanks for phase shift photomasks, and phase shift photomasks | Hiroshi Mohri, Masahiro Takahashi, Jiro Takei, Sachiko Ishikita | 1996-10-01 |
| 5538816 | Halftone phase shift photomask, halftone phase shift photomask blank, and methods of producing the same | Keiji Hashimoto, Junji Fujikawa, Hiroshi Mohri, Masahiro Takahashi, Yukio Iimura | 1996-07-23 |
| 5380608 | Phase shift photomask comprising a layer of aluminum oxide with magnesium oxide | Masahiro Takahashi, Hiroshi Mohri | 1995-01-10 |
| 5125773 | Boring bar | Kiyoshi Miyashita, Yukio Matsumura | 1992-06-30 |
| 4592046 | Subscriber's circuit for time division switching system | Yoshihiro Kawata, Tsunetaka Sakata, Teruo Matsufuji, Tetsuro Inomata | 1986-05-27 |
| 4583214 | Key telephone transmission system | Akira Hirato, Yoshihiro Kawata | 1986-04-15 |