Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Automatic calling systems for accessing communications networks

Automatic calling systems for accessing communications networks

US Patent 4513175 · Granted Apr 23, 1985

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Method and apparatus for the measurement of the internal circumference of compli1985
Programmable automatic calling systems1984
Multimessage automatic telephone polling methods and apparatus1984
Techniques for detecting a condition of response on a telephone line1982
Telephone polling apparatus using a plurality of timers to detect the line condi1980
Telephone sequential number dialer with number incrementing1980