Granted Patent
Utility
US 6,716,144 · App. 09/539,682
Abdominal exercise machine
Inventor:
Tessema Dosho Shifferaw
Patented Case
View Patent ↗
Granted: Apr 6, 2004
Filed: Mar 30, 2000
Inventor
Tessema Dosho Shifferaw
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.