Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Telephone line status circuit

Telephone line status circuit

US Patent 4734933 · Granted Mar 29, 1988

Estimated economic value: $3,248,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Palm PC dockable phone2003
Telephone with handwriting recognition2003
Power supply for ethernet LAN connected telephone2002
Non-saturating, flux cancelling diplex filter for power line communications2001
Communications switching system1988
Solid state trunk circuit1988
Constant current line circuit1988
Two wire voice and data subscriber loop1986
Voice and data interface circuit1986
Control circuit for telephone subscriber station1980