Granted Patent
Utility
US 6,545,595 · App. 09/668,191
CD quality wireless door chime
Inventor:
Thomas G. Xydis
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Sep 22, 2000
Inventor
Thomas G. Xydis
Assignee (at issue)
The Lamson & Sessions Co.
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.