IP Library › Granted Patent US 4,608,999
Granted Patent Utility
US 4,608,999 · App. 06/654,421

Cigarette filter

Inventor: Robert R. Johnson
Patented Case View Patent ↗
Granted: Sep 2, 1986 Filed: Jan 31, 1984
Inventor
Robert R. Johnson
Assignee (at issue)
Brown & Williamson Tobacco Corporation

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Quick Facts
Patent No.
US 4,608,999
App. No.
06/654,421
Filed
1984-01-31
Granted
1986-09-02
Kind
A