Koichi Oyama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Stencil printer
- Patent number 6,508,168
- Issue date Jan 21, 2003
- Riso Kagaku Corporation
- Yasuhiro Takahashi
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Sheet feeding device
- Patent number 5,707,057
- Issue date Jan 13, 1998
- Riso Kagaku Corporation
- Koichi Oyama
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Ink container holding device in rotary printing machine
- Patent number 5,609,101
- Issue date Mar 11, 1997
- Riso Kagaku Corporation
- Koichi Oyama
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Rotary printing machine
- Patent number 5,558,019
- Issue date Sep 24, 1996
- Riso Kagaku Corporation
- Muneaki Kawai
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS