Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Programmable source for supplying controllably variable AC/DC voltage output for telephone line measurement apparatus

Programmable source for supplying controllably variable AC/DC voltage output for telephone line measurement apparatus

US Patent 5521959 · Granted May 28, 1996

Estimated economic value: $3,303,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Multiple-mode modulator to process baseband signals2011
Handheld computer based system for collection, display and analysis of engine/ve2004
Telephone ringback test device and method1999
Arrangement for testing telephone subscriber line circuit via B-1997
Remote measurement unit containing integrated line measurement and conditioning 1997
Regulated power supply having wide input AC/DC voltage range1996
Diagnostic mechanism for monitoring operational status of remote monitoring and 1996
Diagnostic mechanism for monitoring operational status of remote monitoring and 1996
Phase differential measurement circuit1995
Phase differential measurement circuit1995
Method and apparatus for transducer measurements on a metallic pair1992
Method and apparatus for accessing communication systems1986