Granted Patent
Utility
US 6,564,994 · App. 09/764,922
Expandable envelope construction
Inventors:
Marvin A. Makofsky, Jerome B. Schwartz
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Jan 18, 2001
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.