Granted Patent
Utility
US 6,041,894 · App. 09/038,347
Cart automatic brake mechanism
Inventors:
Daniel Leigh Otterson, Gary Erickson
Patented Case
View Patent ↗
Granted: Mar 28, 2000
Filed: Mar 11, 1998
Inventors
Daniel Leigh Otterson
Gary Erickson
Assignee (at issue)
Smarte Carte, 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.