Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Ringing signal generator

Ringing signal generator

US Patent 4239941 · Granted Dec 16, 1980

Estimated economic value: $2,225,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Computer-implemented method of dividend stock tracking and administering advance2024
Grounding connectors2019
Battery boost apparatus2013
Cordless mower including cooling air flow arrangement2013
Scrubber2010
Hand held scrubbing tool2010
Hand vacuum with filter indicator2008
Scrubber2008
Hand held scrubbing tool2008
Line generating device2006
Two wire circuit for a laser pendulum2006
Laser level2005