Granted Patent
Utility
US 6,416,446 · App. 09/246,825
Selectorized dumbbell
Inventor:
Mark A. Krull
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Feb 8, 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.