Granted Patent
Utility
US 4,699,186 · App. 06/833,826
Laser fill-level indicator for blank syringes
Inventors:
Philip R. Palin, Bruce N. Watts
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Feb 26, 1986
Inventors
Philip R. Palin
Bruce N. Watts
Assignee (at issue)
COLLAGEN CORPORATION
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.