Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Protection circuit for telephone systems

Protection circuit for telephone systems

US Patent 5638440 · Granted Jun 10, 1997

Estimated economic value: $12,003,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Via bond attachment2024
Power delivery system having low- and high-power power supplies2023
Dual-loop regulated switched capacitor DC-DC converter2021
Resistance grip strengthening glove2019
Apparatus and method for measuring load current by applying compensated gain to 2018
Display screen or portion thereof with graphical user interface2017
Display screen or portion thereof with animated graphical user interface2017
Display screen or portion thereof with animated graphical user interface2017
Display screen or portion thereof with animated graphical user interface2017
Display screen or portion thereof with animated graphical user interface2017
Display screen or portion thereof with animated graphical user interface2017
Display screen or portion thereof with animated graphical user interface2017