Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method and apparatus for providing answer supervision and an autonomous pay telephone incorporating the same

Method and apparatus for providing answer supervision and an autonomous pay telephone incorporating the same

US Patent 5361297 · Granted Nov 1, 1994

Estimated economic value: $3,970,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Device and method for providing indication to rear vehicle depending on brake fo2020
Transaction system for video matching2010
Method and apparatus for providing answer supervision and an autonomous pay tele1992
Method and apparatus for providing answer supervision and an autonomous pay tele1992
Method and apparatus for providing answer supervision and an autonomous pay tele1992