Granted Patent
Utility
US 4,454,643 · App. 06/255,682
Combination membraning tool, package and calibration unit for eyelid sensor or the like
Inventors:
David E. Downie, Gary Schneiderman, Eric Shulse, Stanley J. Withers
Patented Case
View Patent ↗
Granted: Jun 19, 1984
Filed: Apr 20, 1981
Inventors
David E. Downie
Gary Schneiderman
Eric Shulse
Stanley J. Withers
Assignee (at issue)
Thoratec Laboratories 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.