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US3274345A Expired / Lapsed US ⏱️ 0.0 years remaining

Call transmitter

Assignee: AT&T Inc
•
Filing: 1963-07-01
•
Granted: 1966-09-20
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Expires: 1983-07-01
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Abstract

No abstract record available.

Inventors

  • 👤 Jr James H Ham
  • 👤 Willard E Hostetler
  • 👤 James F Ritchey
  • 👤 Warren R Tolman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 21:15
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/27; H04M1/274; H04M1/278

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 216 words
AN INTEGRATED CALL AND DATA TRANSMITTER PERMITTING EITHER MANUAL OR AUTOMATIC OPERATION, THE AUTOMATIC OPERATION BEING RESPONSIVE TO A CODE BEARING MEDIUM HAVING EACH DIGIT OF A NUMBER TO BE CALLED OR DATA TO BE TRANSMITTED SPACEDLY ENCODED THEREON, THE CALL AND DATA TRANSMITTED COMPRISING: AN ALTERNATING CURRENT SIGNAL GENERATOR IN CLUDING A RESONANT CIRCUIT ADAPTED TO RESONATE AT DISCRETE FREQUENCIES, AN AMPLIFYING MEANS FOR SUSTAINING THE RESONATING OF THE RESONANT CIRCUIT, AND SWITCHING MEANS FOR ENABLING THE AMPLIFYING MEANS; MANUAL MEANS FOR OPERATING THE SIGNAL GENERATOR COMPRISING A PLURALITY OF PUSHBUTTONS, EACH PUSHBUTTON BEING ASSOCIATED WITH A DIFFERENT DIGIT, AND EACH PUSHBUTTON BEING OPERATIVE TO SELECT A DISCRETE FREQUENCY OF THE RESONANT CIRCUIT AND ACTUATE THE SWITCHING MEANS; AND AUTOMATIC MEANS FOR OPERATING THE SIGNAL GENERATOR COMPRISING MEANS FOR SENSING THE CODING ON THE CODE BEARING MEDIUM, MEANS FOR MOVING THE CODE BEARING MEDIUM AND THE SENSING MEANS RELATIVE TO ONE ANOTHER, MEANS FOR INITIATIN THE OPERATION OF THE MOVING MEANS, THE ACTUATION OF THE INITIATING MEANS OPERATING THE SWITCHING MEANS, AND THE RELATIVE MOVEMENT BETWEEN THE CODE BEARING MEDIUM AND THE SENSING MEANS CAUSING THE PERIODIC ACTUATION OF THE SENSING MEANS BY THE CODING ON THE CODE BEARING MEDIUM, THE ACTUATED SENSING MEANS BEING OPERATIVE TO SELECT A DISCRETE FREQUENCY OF THE RESONANT CIRCUIT.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-09-19 1970-03-21 1970-09-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-09-19 1974-03-21 1974-09-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-09-19 1978-03-21 1978-09-20 $7700.00 Window Closed / Lapsed

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