Granted Patent
Utility
US 6,057,774 · App. 09/234,536
Smoke alarm with anti-dust screen
Inventor:
Kenneth L. Venzant
Patented Case
View Patent ↗
Granted: May 2, 2000
Filed: Jan 21, 1999
Inventor
Kenneth L. Venzant
Assignee (at issue)
BRK Brands, Inc.
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.