Granted Patent
Utility
US 4,227,772 · App. 05/789,265
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Inventor:
Sidney A. Heenan
Patented Case
View Patent ↗
Granted: Oct 14, 1980
Filed: Apr 20, 1977
Inventor
Sidney A. Heenan
Assignee (at issue)
ARTERICA INC.
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.