Granted Patent
Utility
US 5,970,544 · App. 09/057,426
Mattress cover
Inventor:
Virgil L. Kardell
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Apr 8, 1998
Inventor
Virgil L. Kardell
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.