Wai-Shing P. Ko

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Kwai Chung, HK

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Patents Grantslast 30 patents

Information Patent Grant
Two-level security lighting system
- Patent number 5,747,937
- Issue date May 5, 1998
- Heath Company, Inc.
- David L. Wiesemann
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Two-level security lighting system
- Patent number 5,598,066
- Issue date Jan 28, 1997
- Heath Company
- David L. Wiesemann
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR