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Patent applications and USPTO patent grants for Feng; Ou-Yang.The latest application filed is for "telescopic rod means having rotatably retractable display sheet".
Patent | Date |
---|---|
Telescopic rod means having rotatably retractable display sheet Grant 4,944,656 - Feng , et al. July 31, 1 | 1990-07-31 |
Telescopic rod means with rolling display sheet Grant 4,800,834 - Feng January 31, 1 | 1989-01-31 |
Advertising writing instrument Grant 4,787,161 - Feng November 29, 1 | 1988-11-29 |
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