Yukio Tokunaga

Person

Fujieda, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Color developer for pressure-sensitive recording paper
- Patent number 5,034,370
- Issue date Jul 23, 1991
- Sumitomo Durez Company, Ltd.
- Yukio Saeki
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Color developer for pressure sensitive recording paper and producti...
- Patent number 4,920,186
- Issue date Apr 24, 1990
- Sumitomo Durez Company, Ltd.
- Yukio Tokunaga
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Color developer for pressure-sensitive recording paper and producti...
- Patent number 4,920,185
- Issue date Apr 24, 1990
- Sumitomo Durez Company, Ltd.
- Yukio Tokunaga
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Production of phenolic resin composite foam
- Patent number 4,698,370
- Issue date Oct 6, 1987
- Sumitomo Durez Company, Ltd.
- Yukio Saeki
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Manufacturing method for phenol resin foam
- Patent number 4,694,028
- Issue date Sep 15, 1987
- Sumitomo Durez Company, Ltd.
- Yukio Saeki
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Coated sand and method for producing
- Patent number 4,468,486
- Issue date Aug 28, 1984
- Sumitomo Durez Company, Ltd.
- Noriaki Matsushima
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Resin coated sand composition and method of producing same
- Patent number 4,460,717
- Issue date Jul 17, 1984
- Sumitomo Durez Company, Ltd.
- Yukio Saeki
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Coated sand composition and method for producing same
- Patent number 4,460,716
- Issue date Jul 17, 1984
- Sumitomo Durez Company, Ltd.
- Yukio Saeki
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Resin-coated sand for shell-molds and method for producing same
- Patent number 4,459,376
- Issue date Jul 10, 1984
- Sumitomo Durez Company, Ltd.
- Noriaki Matsushima
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Resin coated sand for shell molding process
- Patent number 4,452,927
- Issue date Jun 5, 1984
- Sumitomo Durez Company, Ltd.
- Noriaki Matsushima
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Resin coated sand and method for producing same
- Patent number 4,418,161
- Issue date Nov 29, 1983
- Sumitomo Durez Company, Ltd.
- Noriaki Matsushima
- B22 - CASTING POWDER METALLURGY

Yukio Tokunaga

Person

Patents Grantslast 30 patents

Color developer for pressure-sensitive recording paper

Color developer for pressure sensitive recording paper and producti...

Color developer for pressure-sensitive recording paper and producti...

Production of phenolic resin composite foam

Manufacturing method for phenol resin foam

Coated sand and method for producing

Resin coated sand composition and method of producing same

Coated sand composition and method for producing same

Resin-coated sand for shell-molds and method for producing same

Resin coated sand for shell molding process

Resin coated sand and method for producing same