Granted Patent
Utility
US 4,381,790 · App. 06/310,694
Roller clip
Inventors:
William E. Springer, Stewart K. Kurtz
Patented Case
View Patent ↗
Granted: May 3, 1983
Filed: Oct 13, 1981
Inventors
William E. Springer
Stewart K. Kurtz
Assignee (at issue)
Clairol Incorporated
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.