Granted Patent
Utility
US 4,236,156 · App. 06/032,448
Switching of thermochromic and pressure sensitive films with surface acoustic waves
Inventor:
Dayton D. Eden
Patented Case
View Patent ↗
Granted: Nov 25, 1980
Filed: Apr 23, 1979
Inventor
Dayton D. Eden
Assignee (at issue)
Vought 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.