Wako Technical Co., Ltd.

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Patents Grantslast 30 patents

Information Patent Grant
Vacuum tube differential preamplifier having a transformer with a c...
- Patent number 6,111,460
- Issue date Aug 29, 2000
- Wako Technical Co., Ltd.
- Fujio Yamasita
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Tube amplifier having special configuration with two or more tubes
- Patent number 5,880,632
- Issue date Mar 9, 1999
- Wako Technical Co., Ltd.
- Fujio Yamasita
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Lubrication boosting additives comprising organic titanium compound...
- Patent number 5,000,863
- Issue date Mar 19, 1991
- Violet Co., Ltd.
- Ryoji Watanabe
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...