Patent US3308918A successfully refreshed from Google Patents.
US3308918A
Expired / Lapsed
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Pseudo-interlock employing strobe signal with selected keys
Assignee: International Business Machines Corp
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Filing: 1965-09-20
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Granted: 1967-03-14
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Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Randell L James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:49
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; G; G06; G06F; G06F3/00; G06F3/09; H03; H03M; H03M11/00; H03M11/02; H04L13/00; H04L13/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A TERMINAL FOR TYPING AND FOR TRANSMITTING CODE SIGNALS OF AT LEAST SOME MESSAGES TYPED COMPRISING: A FIRST SET OF KEYBOARD KEYS CONNECTED TO GENERATE SIGNALS FOR TRANSMISSION WHEN EACH OF SAID KEYS IS OPERATED, MEANS TO CREATE A FIRST CONDITION WHEN A KEY FROM SAID FIRST SET OF KEYS IS OPERATED, AT LEAST ONE OTHER KEYBOARD KEY CONNECTED TO GENERATE SIGNALS FOR TRANSMISSION WHEN OPERATED, A REGISTER TO STORE SIGNALS GENERATED PRIOR TO TRANSMISSION OF SAID SIGNALS, MEANS RESPONSIVE TO SIGNALS STORED IN SAID REGISTER TO CREATE A SECOND CONDITION WHEN SAID REGISTER HOLDS A SIGNAL IDENTICAL IN MEANING TO THAT CREATED BY SAID OTHER KEY, MEANS TO GENERATE A RESPONSE CONDITION WHEN SAID FIRST CONDITION AND SAID SECOND CONDITION BOTH OCCUR PRIOR TO THE KEYBOARD GENERATION OF A SUBSEQUENT SIGNAL, AND
Claim 2
Dependent Claim
133 words
A TERMINAL FOR TYPING AND FOR TRANSMITTING CODE SIGNALS OF AT LEAST SOME MESSAGES TYPED COMPRISING: A FIRST SET OF KEYBOARD KEYS CONNECTED TO GENERATE SIGNALS FOR TRANSMISSION WHEN EACH OF SAID KEYS IS OPERATED, MEANS TO CREATE A FIRST CONDITION WHEN A KEY FROM SAID FIRST SET OF KEYS IS OPERATED, AT LEAST ONE OTHER KEYBOARD KEY CONNECTED TO GENERATE SIGNALS FOR TRANSMISSION WHEN OPERATED, A REGISTER TO STORE SIGNALS GENERATED PRIOR TO TRANSMISSION OF SAID SIGNALS, MEANS RESPONSIVE TO SIGNALS STORED IN SAID REGISTER TO CREATE A SECOND CONDITION WHEN SAID REGISTER HOLDS A SIGNAL IDENTICAL IN MEANING TO THAT CREATED BY SAID OTHER KEY, MEANS TO GENERATE A RESPONSE CONDITION WHEN SAID FIRST CONDITION AND SAID SECOND CONDITION BOTH OCCUR PRIOR TO THE KEYBOARD GENERATION OF A SUBSEQUENT SIGNAL, AND
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |