IP Library › Granted Patent US 4,890,756
Granted Patent Utility
US 4,890,756 · App. 07/232,383

Cylindrical tank with flared upper end

Inventor: David L. Waltke
Patented Case View Patent ↗
Granted: Jan 2, 1990 Filed: Aug 15, 1988
Inventor
David L. Waltke
Assignee (at issue)
Hoover Limited

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Quick Facts
Patent No.
US 4,890,756
App. No.
07/232,383
Filed
1988-08-15
Granted
1990-01-02
Kind
A