Granted Patent
Utility
US 5,958,470 · App. 08/842,332
Vacuum forming apparatus for forming a three-dimensional surface article
Inventors:
Glenn T. Harding, William D. Harding, William Liddle
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Apr 23, 1997
Inventors
Glenn T. Harding
William D. Harding
William Liddle
Assignee (at issue)
Hallmark Cards, Incorporated
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.