The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 2010
Filed:
Nov. 10, 2004
Masahisa Masuda, Beaverton, OR (US);
Yasuhiro Kume, Tokyo, JP;
Masahisa Masuda, Beaverton, OR (US);
Yasuhiro Kume, Tokyo, JP;
Matech, Inc., Lake Oswego, OR (US);
Abstract
A base unit and a handset comprise a wireless part, a control part, and a transmission () and reception part (), respectively. Communications are switched by either of the two ways: PTT switching and tone generation in the base unit, and tone detection in the handset or PTT switching in the base unit, and voice detection in the handset. It is preferable that the transmission () and reception () part of the handset includes a single transducer type headphone. It is also preferable that photo-coupler () and a photo-switch () are provided at connection point of signal paths between the transmission () and reception part (), the control part, and between the control part and the wireless part.