US3257657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital to analog converter utilizing a function generator
Assignee: International Business Machines Corp
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Filing: 1963-12-16
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Granted: 1966-06-21
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Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Walter K French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:00
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/30; G06F9/34; G06F9/355; H; H03; H03M; H03M1/00; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/042; H03M1/06; H03M1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A SYSTEM FOR DECODING DIGITAL CODE SIGNALS INTO AN ANALOG SIGNAL COMPRISING: A SOURCE OF DATA PULSES HAVING DIFFERENT SCALER VALUES, A SOURCE OF WAVEFORM SIGNAL SYNCHRONOUS WITH SAID DATA PULSES HAVING AN AMPLITUDE WHICH VARIES PROPORTIONALLY WITH THE SCALER VALUES OF SAID DATA PULSES IN SYNCHRONISM THEREWITH, GATING MEANS COUPLED TO SAID SOURCE OF DATA PULSES AND SAID SOURCE OF WAVEFORM SIGNAL FOR GATING PORTIONS OF SAID WAVEFORM SIGNAL IN RESPONSE TO SAID DATA PULSES,
Claim 2
Independent Claim
76 words
A SYSTEM FOR DECODING DIGITAL CODE SIGNALS INTO AN ANALOG SIGNAL COMPRISING: A SOURCE OF DATA PULSES HAVING DIFFERENT SCALER VALUES, A SOURCE OF WAVEFORM SIGNAL SYNCHRONOUS WITH SAID DATA PULSES HAVING AN AMPLITUDE WHICH VARIES PROPORTIONALLY WITH THE SCALER VALUES OF SAID DATA PULSES IN SYNCHRONISM THEREWITH, GATING MEANS COUPLED TO SAID SOURCE OF DATA PULSES AND SAID SOURCE OF WAVEFORM SIGNAL FOR GATING PORTIONS OF SAID WAVEFORM SIGNAL IN RESPONSE TO SAID DATA PULSES,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |