Granted Patent
Utility
US 4,872,397 · App. 07/276,698
Personal environmental module
Inventors:
Michael Demeter, Paul E. Wichman, Linda S. Endres, Charles E. Rohrer
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Nov 28, 1988
Inventors
Michael Demeter
Paul E. Wichman
Linda S. Endres
Charles E. Rohrer
Assignee (at issue)
Johnson Service Company
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.