Granted Patent
Utility
US 6,588,677 · App. 09/980,664
Rail boot
Inventors:
Don R. Hofstetter, Sr., Mark Grundmann
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Nov 2, 2001
Inventors
Don R. Hofstetter, Sr.
Mark Grundmann
Assignee (at issue)
Iron Horse Engineering Co.
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.