Granted Patent
Utility
US 6,820,799 · App. 10/417,772
Expandable envelope construction
Inventors:
Marvin A. Makofsky, Jerome B. Schwartz
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Apr 17, 2003
Inventors
Marvin A. Makofsky
Jerome B. Schwartz
Assignee (at issue)
Pama Enterprises, Inc.
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.