YAMATOYA & CO., LTD
19Patents
2Active
19Granted
33Portfolio score
Filing activity: Dec 28, 1978 → Feb 26, 2014 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5072305A | Picture producing apparatus using picture information values correlated to light intensities in tonal conversion formula | Electricity | 26 | Expired |
| US4811108A | Tonal conversion method for pictures | Electricity | 25 | Expired |
| US4956718A | Tonal conversion method for pictures | Electricity | 23 | Expired |
| US4924323A | Tonal conversion method for pictures | Electricity | 23 | Expired |
| USD590608S1 | Baby chair | General | 18 | Expired |
| US4833546A | Photomechanical apparatus | Electricity | 15 | Expired |
| US4244408A | Utility bag | Human Necessities | 15 | Expired |
| US5841897A | Method for the tonal control or adjustment of reproduced color image and picture producing system making use of said method | Electricity | 12 | Expired |
| US6391473B2 | Cu plated ceramic substrate and a method of manufacturing the same | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5057931A | Tonal conversion method of pictures for producing reproduced pictures free of color-fog | Electricity | 11 | Expired |
| USD614873S1 | Baby chair | General | 9 | Expired |
| US7704577B2 | Bag | Emerging Cross-Sectional Technologies | 6 | Active |
| US5212518A | Tonal conversion method for a faded color photographic original picture | Electricity | 5 | Expired |
| US5313310A | Tonal conversion method for pictures | Electricity | 4 | Expired |
| US5371616A | Tonal conversion method of a picture | Electricity | 4 | Expired |
| US5286609A | Process for the formation of a negative resist pattern from a composition comprising a diazoquinone compound and an imidazole and having as a heat step the use of a hot water containing spray | Physics | 3 | Expired |
| US5134494A | Method for producing color and black plates in a multi-color plate making apparatus | Electricity | 3 | Expired |
| US5014120A | Method for processing picture to be reproduced on color picture tube and processor therefor | Electricity | 2 | Expired |
| US9857687B2 | Method of manufacturing substrate and substrate and mask film | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.