Yoshifumi Hara

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Hirakata, JP

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Patents Grantslast 30 patents

Information Patent Grant
Fault examining apparatus for loop-shaped data transmission system...
- Patent number 5,119,222
- Issue date Jun 2, 1992
- Matsushita Electrical Industrial Co. Ltd.
- Yoshifumi Hara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data transmission apparatus
- Patent number 5,031,095
- Issue date Jul 9, 1991
- Matsushita Electric Industrial Co., Ltd.
- Yoshifumi Hara
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Loop-type optical fiber transmission system having master and slave...
- Patent number 4,941,206
- Issue date Jul 10, 1990
- Matsushita Electric Industrial Co., Ltd.
- Tsutomu Sakurai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE