Patent US3105955A successfully refreshed from Google Patents.
US3105955A
Expired / Lapsed
US
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Error checking device
Assignee: Unisys Corp
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Filing: 1956-03-28
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Granted: 1963-10-01
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Expires: 1976-03-28
Abstract
No abstract record available.
Inventors
- 👤 John W Mauchly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:51
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/079; G06F11/0766; G06F11/0772
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN AN ERROR CHECKING DEVICE, A SOURCE OF PERIODIC PULSE PATTERN OF DIGITAL SIGNAL GROUPS, A DYNAMIC DELAY DEVICE OPERATIVELY COUPLED TO SAID SOURCE, SAID DELAY DEVICE HAVING A DELAY EQUAL TO AN INTEGRAL NUMBER OF PERIODS OF SAID PERIODIC PATTERN OF DIGITAL SIGNAL GROUPS, AND A DIGITAL PULSE COMPARING DEVICE HAVING FIRST AND SECOND INPUT CIRCUITS AND AN OUTPUT CIRCUIT, SAID DIGITAL PULSE COMPARING DEVICE INCLUDING AN EXCLUSIVE-OR GATE CIRCUIT, OPERATIVE TO DELIVER AN OUTPUT SIGNAL UPON THE OCCURRENCE OF ANTI-COINCIDENCE OF PULSE SIGNALS TO THE RESPECTIVE INPUT CIRCUITS OF SAID DIGITAL PULSE COM-
Claim 2
Dependent Claim
95 words
IN AN ERROR CHECKING DEVICE, A SOURCE OF PERIODIC PULSE PATTERN OF DIGITAL SIGNAL GROUPS, A DYNAMIC DELAY DEVICE OPERATIVELY COUPLED TO SAID SOURCE, SAID DELAY DEVICE HAVING A DELAY EQUAL TO AN INTEGRAL NUMBER OF PERIODS OF SAID PERIODIC PATTERN OF DIGITAL SIGNAL GROUPS, AND A DIGITAL PULSE COMPARING DEVICE HAVING FIRST AND SECOND INPUT CIRCUITS AND AN OUTPUT CIRCUIT, SAID DIGITAL PULSE COMPARING DEVICE INCLUDING AN EXCLUSIVE-OR GATE CIRCUIT, OPERATIVE TO DELIVER AN OUTPUT SIGNAL UPON THE OCCURRENCE OF ANTI-COINCIDENCE OF PULSE SIGNALS TO THE RESPECTIVE INPUT CIRCUITS OF SAID DIGITAL PULSE COM-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |