Granted Patent
Utility
US 4,843,582 · App. 07/058,294
Digital filter in which linear combinations of powers of two are converted to binary numbers using wallace trees
Inventors:
Berthold Heck, Joachim Speidel
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Jun 5, 1987
Inventors
Berthold Heck
Joachim Speidel
Assignee (at issue)
U.S. Philips 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.