IP Library › Granted Patent US 4,820,449
Granted Patent Utility
US 4,820,449 · App. 07/124,693

Cleaning block for flush toilet tanks

Inventors: Ronald Menke, Bernd-Dieter Holdt, Gerd Praus
Patented Case View Patent ↗
Granted: Apr 11, 1989 Filed: Nov 24, 1987
Inventors
Ronald Menke
Bernd-Dieter Holdt
Gerd Praus
Assignee (at issue)
Henkel Kommanditgesellschaft auf Aktien

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Quick Facts
Patent No.
US 4,820,449
App. No.
07/124,693
Filed
1987-11-24
Granted
1989-04-11
Kind
A