Granted Patent
Utility
US 6,644,491 · App. 09/933,367
Tamper-evident cap
Inventors:
Chris Dewig, William Nally
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Aug 20, 2001
Inventors
Chris Dewig
William Nally
Assignee (at issue)
Berry Plastics Corporation
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.