Granted Patent
Utility
US 6,446,402 · App. 09/608,248
Thermochromic devices
Inventors:
Harlan J. Byker, Paul H. Ogburn, Jr.
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Jun 30, 2000
Inventors
Harlan J. Byker
Paul H. Ogburn, Jr.
Assignee (at issue)
Pleotint, L.L.C.
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.