Granted Patent
Utility
US 6,648,862 · App. 09/996,970
Personally portable vacuum desiccator
Inventor:
Richard Watson
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Nov 20, 2001
Inventor
Richard Watson
Assignee (at issue)
Spheric Products, Ltd.
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.