Granted Patent
Utility
US 4,938,293 · App. 07/392,218
Linear fire extinguisher
Inventors:
Donald E. Warren, Maurice E. Tyler
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: Aug 7, 1989
Inventors
Donald E. Warren
Maurice E. Tyler
Assignee (at issue)
Systron Donner 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.