IP Library › Granted Patent US 4,509,140
Granted Patent Utility
US 4,509,140 · App. 06/391,778

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Inventor: Kin Cheung
Patented Case View Patent ↗
Granted: Apr 2, 1985 Filed: Jun 24, 1982
Inventor
Kin Cheung
Assignee (at issue)
Wang Laboratories, Inc.

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Quick Facts
Patent No.
US 4,509,140
App. No.
06/391,778
Filed
1982-06-24
Granted
1985-04-02
Kind
A