Ou-Yang Feng

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Taipei, TW

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Patents Grantslast 30 patents

Information Patent Grant
Telescopic rod means having rotatably retractable display sheet
- Patent number 4,944,656
- Issue date Jul 31, 1990
- Ou-Yang Feng
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Telescopic rod means with rolling display sheet
- Patent number 4,800,834
- Issue date Jan 31, 1989
- Ou-Yang Feng
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Advertising writing instrument
- Patent number 4,787,161
- Issue date Nov 29, 1988
- Ou-Yang Feng
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES