Toshiyuki Ishikawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electromagnetic wave shielding transparent body
- Patent number 4,978,812
- Issue date Dec 18, 1990
- Asahi Glass Company, Ltd.
- Kazuyuki Akeyoshi
- B32 - LAYERED PRODUCTS
Information Patent Grant
Electromagnetically shielded partition wall structure
- Patent number 4,932,180
- Issue date Jun 12, 1990
- Shimizu Construction Co., Ltd.
- Takeshi Takahashi
- E04 - BUILDING
Information Patent Grant
Electromagnetic shield-type doorway for buildings and electromagnet...
- Patent number 4,894,489
- Issue date Jan 16, 1990
- Shimizu Construction Co., Ltd.
- Takeshi Takahashi
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
System for detecting and processing abnormality in electromagnetic...
- Patent number 4,814,694
- Issue date Mar 21, 1989
- Shimizu Construction Co., Ltd.
- Takeshi Takahashi
- G01 - MEASURING TESTING
Information Patent Grant
Radio wave leakage diagnosing system for intelligent building
- Patent number 4,810,961
- Issue date Mar 7, 1989
- Shimizu Construction Co., Ltd.
- Takeshi Takahashi
- G01 - MEASURING TESTING
Information Patent Grant
Electromagnetic shield structure for building windows
- Patent number 4,758,686
- Issue date Jul 19, 1988
- Shimizu Construction Co., Ltd.
- Takeshi Takahashi
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS