Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Digital key telephone system

Digital key telephone system

US Patent 5027345 · Granted Jun 25, 1991

Estimated economic value: $11,314,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Joint assembly and method of manufacturing thereof2025
Harvesting and distributing a certificate based on a DNS name2021
Harvesting and distributing a certificate based on a DNS name2020
Encrypted push message viewing system2020
Secure transmission system with upgraded encryption strength2020
Touch-sensitive interface with shell mounting, touch-sensitive shell, and mechan2019
Authenticating a system based on a certificate2019
Secure message forwarding with sender controlled decryption2017
Multi-factor authentication2016
Multi-factor authentication2015
Serially connected processing elements having forward and reverse processing tim2011
Calculating apparatus having a plurality of stages2010