Granted Patent
Utility
US 4,558,528 · App. 06/475,374
Openable package for a consumer product such as child's meal, with a built-in 3-D viewer feature simulating a theater
Inventor:
William D. Cunningham
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Mar 14, 1983
Inventor
William D. Cunningham
Assignee (at issue)
Hardee's Food Systems, 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.