Granted Patent
Utility
US 4,618,315 · App. 06/694,912
Small fan
Inventors:
Georg Papst, Gunter Wrobel
Patented Case
View Patent ↗
Granted: Oct 21, 1986
Filed: Jan 28, 1985
Inventors
Georg Papst
Gunter Wrobel
Assignee (at issue)
Papst Motoren
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.