Granted Patent
Utility
US 5,054,735 · App. 07/534,804
Active-substance support for beehives
Inventor:
Michael Bayer
Patented Case
View Patent ↗
Granted: Oct 8, 1991
Filed: Jun 7, 1990
Inventor
Michael Bayer
Assignee (at issue)
Bayer Aktiengesellschaft
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.