Tsukasa Ohyama
15Patents
5h-index
21Co-inventors
58Inventor score
Filing activity: Dec 28, 1988 → Aug 18, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5045434A | Visible radiation sensitive composition containing substituted 3-(benzothiazo-2-yl)-7-diethylaminocoumarin as sensitizers | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5300475A | Sublimation thermal transfer printing sheet comprising novel magenta dyestuffs | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5342974A | Halogenated anthraquinone and their use as near infrared rays absorbing optical filters | Physics | 5 | Expired |
| US5358536A | Dyestuff for heat-sensitive transfer record and transfer sheet containing same | Chemistry; Metallurgy | 5 | Expired |
| US4954410A | Color toner composition | Physics | 5 | Expired |
| US5567470A | Heat-sensitive transfer sheet containing blue dyestuff | Chemistry; Metallurgy | 4 | Expired |
| US5168093A | Sublimation thermaltransfer printing sheet comprising novel magenta dyestuffs | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5387686A | Dye for heat-sensitive transfer record and ink composition for heat-sensitive transfer record | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5359075A | Quinophthalone compound | Chemistry; Metallurgy | 3 | Expired |
| US5248784A | 4-carbonyl-substituted coumarin compound | Physics | 2 | Expired |
| US5302573A | Transfer sheet for sublimation recording | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5002925A | Isopropyl 1-amino-4-m-toluidinoanthraquinone-2-carboxylate, cyan composition for sublimation transfer record and cyan composition for color toner containing it | Chemistry; Metallurgy | 1 | Expired |
| US5182395A | Isopropyl 1-amino-4-m-toluidinoanthraquinone-2-carboxylate | Chemistry; Metallurgy | 0 | Expired |
| US5183474A | Heat-sensitive sublimation transfer cyan dye and transfer sheet | Emerging Cross-Sectional Technologies | 0 | Expired |
| US5296445A | Dye for heat-sensitive transfer record, ink composition for heat-sensitive transfer record, and transfer sheet | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.