Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5841897 | Method for the tonal control or adjustment of reproduced color image and picture producing system making use of said method | Iwao Numakura, Susumu Kitazawa | 1998-11-24 |
| 5406394 | Color reproducing method used in an image data processing system comprising independent input and output devices | Iwao Numakura | 1995-04-11 |
| 5371616 | Tonal conversion method of a picture | Iwao Numakura | 1994-12-06 |
| 5357349 | Tonal conversion method for a picture | Iwao Numakura | 1994-10-18 |
| 5313310 | Tonal conversion method for pictures | Iwao Numakura | 1994-05-17 |
| 5212518 | Tonal conversion method for a faded color photographic original picture | Iwao Numakura | 1993-05-18 |
| 5134494 | Method for producing color and black plates in a multi-color plate making apparatus | Iwao Numakura | 1992-07-28 |
| 5072305 | Picture producing apparatus using picture information values correlated to light intensities in tonal conversion formula | Iwao Numakura | 1991-12-10 |
| 5057931 | Tonal conversion method of pictures for producing reproduced pictures free of color-fog | Iwao Numakura | 1991-10-15 |
| 5014120 | Method for processing picture to be reproduced on color picture tube and processor therefor | Iwao Numakura | 1991-05-07 |
| 4956718 | Tonal conversion method for pictures | Susumu Kitazawa, Junichi Naya, Iwao Numakura | 1990-09-11 |
| 4924323 | Tonal conversion method for pictures | Iwao Numakura | 1990-05-08 |
| 4833546 | Photomechanical apparatus | Iwao Numakura, Susumu Kitazawa | 1989-05-23 |
| 4811108 | Tonal conversion method for pictures | Iwao Numakura, Susumu Kitazawa | 1989-03-07 |