Granted Patent
Utility
US 6,350,221 · App. 09/374,147
Convertible exercise apparatus with body supporting element
Inventor:
Mark A. Krull
Patented Case
View Patent ↗
Granted: Feb 26, 2002
Filed: Aug 13, 1999
Inventor
Mark A. Krull
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.