Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5624474 | Optical fiber preform manufacturing apparatus which measures a vertical load with three cells | Hiroaki Ohta, Toshio Danzuka | 1997-04-29 |
| 5602951 | Ferrule for optical connector and process for making same | Tetsuo Shiota, Yoshikyo Tamekuni, Tomohiko Ueda, Toshiaki Kakii, Shinji Nagasawa | 1997-02-11 |
| 5556736 | Method for processing a silver halide color photographic light-sensitive material and producing a color image | Tsuyoshi Haraguchi | 1996-09-17 |
| 5552852 | Device of dissolving and replenishing solid processing agents for a silver halide photographic light-sensitive material and automatic processing machine for silver halide photographic light-sensitive material equipped with the device | Tsuyoshi Haraguchi | 1996-09-03 |
| 5470369 | Process for consolidation of porous preform for optical fiber | Toshio Danzuka, Masumi Ito | 1995-11-28 |
| 5378588 | Method for processing silver halide photographic light-sensitive materials which conserves and reuses overflow processing solutions | — | 1995-01-03 |
| 5330548 | Method for producing glass preform for optical fiber | Toshio Danzuka, Masumi Ito | 1994-07-19 |
| 5306322 | Process for thermal treatment of glass fiber preform | Shinji Ishikawa, Yuichi Ohga, Hiroo Kanamori, Hiroshi Yokota, Michihisa Kyoto | 1994-04-26 |
| 5278033 | Stabilizing solution for light-sensitive silver halide color photographic material, and processing method making use of the stabilizing solution | Moeko Hagiwara, Tsuyoshi Haraguchi | 1994-01-11 |
| 5259856 | Method of producing glass preform in furnace for heating glass | Yuichi Ohga, Shinji Ishikawa, Hiroo Kanamori, Hiroshi Yokota | 1993-11-09 |
| 5236482 | Method for producing glass preform for optical fiber | Toshio Danzuka, Masumi Ito, Tatsuhiko Saito | 1993-08-17 |
| 5133796 | Air-tight sintering furnace for the production of a quartz preform | Masahide Saito, Shinji Ishikawa, Toshimi Habasaki | 1992-07-28 |
| 5114338 | Furnace for heating highly pure quartz preform for optical fiber | Shinji Ishikawa, Masahide Saitoh, Yoichi Ishiguro | 1992-05-19 |
| 5106401 | Process for thermal treatment of glass fiber preform | Shinji Ishikawa, Yuichi Ohga, Hiroo Kanamori, Hiroshi Yokota, Michihisa Kyoto | 1992-04-21 |
| 5032079 | Furnace for producing high purity quartz glass preform | Shinji Ishikawa, Masahide Saitoh, Yoichi Ishiguro, Hiroo Kanamori | 1991-07-16 |
| 4969941 | Furnace for heating glass preform for optical fiber and method for producing glass preform | Michihisa Kyoto, Yoichi Ishiguro | 1990-11-13 |
| 4938789 | Raw material supplying device and process | Hiroshi Yokota, Toshio Danzuka, Hideki Minami | 1990-07-03 |
| 4923831 | Magnesia-calcium oxide refractories | Nobuyuki Uzaki, Hiroaki Ishii, Yukio Oguchi, Tatsuo Kawakami | 1990-05-08 |
| 4661140 | Gas reaction apparatus and multi-wall pipe type burner therefor | Hiroaki Takimoto | 1987-04-28 |
| 4574179 | Ion beam machining device | Takahisa Masuzawa | 1986-03-04 |