Granted Patent
Utility
US 6,712,192 · App. 10/129,071
Staircase guide for a stairlift
Inventors:
Martinus J. Hester, Dennis Vroegindeweij
Patented Case
View Patent ↗
Granted: Mar 30, 2004
Filed: Sep 5, 2002
Inventors
Martinus J. Hester
Dennis Vroegindeweij
Assignee (at issue)
Freelift B.V.
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.