Granted Patent
Utility
US 6,091,064 · App. 09/087,989
Safety system with intermittent photoelectric beam
Inventors:
David R. Eaton, Thomas Hartmann
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Jun 1, 1998
Inventors
David R. Eaton
Thomas Hartmann
Assignee (at issue)
TAB Products Company
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.