Granted Patent
Utility
US 5,957,578 · App. 09/073,696
Stand mixer with head locking mechanism
Inventors:
Paul Holbrook, Robert A. St. John
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: May 7, 1998
Inventors
Paul Holbrook
Robert A. St. John
Assignee (at issue)
HP Intellectual Corp.
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.