Granted Patent
Utility
US 4,253,796 · App. 05/940,121
Fan or blower assembly
Inventors:
Donald F. Philipps, Richard D. Williamson
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Sep 6, 1978
Inventors
Donald F. Philipps
Richard D. Williamson
Assignee (at issue)
The Marley-Wylain 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.