Granted Patent
Utility
US 6,213,486 · App. 09/286,277
Step assembly with concealed lower tread
Inventors:
James R. Kunz, Benjamin J. Boyce, Malcolm M. Maccabee
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Apr 5, 1999
Inventors
James R. Kunz
Benjamin J. Boyce
Malcolm M. Maccabee
Assignee (at issue)
Kwikee Products Co., 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.