Hisashi Tamamura

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Lens, semiconductor laser element, device for machining the lens an...
- Patent number 6,255,619
- Issue date Jul 3, 2001
- Nippon Aspherical Lens Co.,
- Takahisa Jitsuno
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Optical attenuator
- Patent number 5,011,265
- Issue date Apr 30, 1991
- Sony/Tektronix Corporation
- Hisashi Tamamura
- G02 - OPTICS
Information Patent Grant
Apparatus for measuring characteristics of electronic devices
- Patent number 4,818,934
- Issue date Apr 4, 1989
- Sony/Tektronix Corporation
- Hisashi Tamamura
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus for measuring characteristics or electronic devices
- Patent number 4,782,290
- Issue date Nov 1, 1988
- Sony/Tektronix, Inc.
- Ryoichi Sakai
- G01 - MEASURING TESTING
Information Patent Grant
Apparatus for measuring characteristics of electronic devices
- Patent number 4,727,318
- Issue date Feb 23, 1988
- Sony/Tektronix Corporation
- Ryoichi Sakai
- G01 - MEASURING TESTING