Granted Patent
Utility
US 5,253,056 · App. 07/908,135
Spatial/frequency hybrid video coding facilitating the derivatives of variable-resolution images
Inventors:
Atul Puri, Andria H. Wong
Patented Case
View Patent ↗
Granted: Oct 12, 1993
Filed: Jul 2, 1992
Inventors
Atul Puri
Andria H. Wong
Assignee (at issue)
AT&T Bell Laboratories
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.