Toshihiko Takahashi

Person

Numazu, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Electroluminescent device comprising oxadiazole compounds luminesce...
- Patent number 5,656,401
- Issue date Aug 12, 1997
- Ricoh Company, Ltd.
- Masafumi Ohta
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Electroluminescent device comprising oxadiazole compounds luminesce...
- Patent number 5,610,309
- Issue date Mar 11, 1997
- Ricoh Company, Ltd.
- Masafumi Ohta
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Method of producing oxadiazole compounds
- Patent number 5,597,925
- Issue date Jan 28, 1997
- Ricoh Company, Ltd.
- Masafumi Ohta
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Electroluminescent device comprising oxadiazole compounds luminesce...
- Patent number 5,420,288
- Issue date May 30, 1995
- Ricoh Company, Ltd.
- Masafumi Ohta
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Fluorine-containing graft copolymer and toner using the same
- Patent number 5,328,794
- Issue date Jul 12, 1994
- Ricoh Company, Ltd.
- Tsubuko Kazuo
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Liquid developer for image fixing method using heat application rol...
- Patent number 5,169,739
- Issue date Dec 8, 1992
- Ricoh Company, Ltd.
- Kazuhiko Umemura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electroluminescent device
- Patent number 5,153,073
- Issue date Oct 6, 1992
- Ricoh Company, Ltd.
- Teruyuki Ohnuma
- B32 - LAYERED PRODUCTS
Information Patent Grant
Electroluminescent device
- Patent number 5,118,986
- Issue date Jun 2, 1992
- Ricoh Company, Ltd.
- Teruyuki Ohnuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electroluminescent device
- Patent number 5,093,210
- Issue date Mar 3, 1992
- Ricoh Company, Ltd.
- Masafumi Ohta
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Negative toner for developing latent electrostatic images
- Patent number 5,085,965
- Issue date Feb 4, 1992
- Ricoh Company, Ltd.
- Toshiki Nanya
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Toshihiko Takahashi

Person

Patents Grantslast 30 patents

Electroluminescent device comprising oxadiazole compounds luminesce...

Electroluminescent device comprising oxadiazole compounds luminesce...

Method of producing oxadiazole compounds

Electroluminescent device comprising oxadiazole compounds luminesce...

Fluorine-containing graft copolymer and toner using the same

Liquid developer for image fixing method using heat application rol...

Electroluminescent device

Electroluminescent device

Electroluminescent device

Negative toner for developing latent electrostatic images