Chi Ping Yeung

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Sai Yung Pun, HK

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Patents Grantslast 30 patents

Information Patent Grant
Foldable mask for camera viewfinder and method of using same to alt...
- Patent number 6,463,218
- Issue date Oct 8, 2002
- Concord Camera Corp.
- Chi Ping Yeung
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY