Patent US3306318A successfully refreshed from Google Patents.
US3306318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security system
Assignee: Wang Laboratories Inc
•
Filing: 1965-02-26
•
Granted: 1967-02-28
•
Expires: 1985-02-26
Abstract
No abstract record available.
Inventors
- 👤 Wang An
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:13
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/32; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8175; Y10T137/8192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SECURITY SYSTEM COMPRISING AN INPUT REGISTER CONTROLLABLE BY A SUBSCRIBER TO PROVIDE A FIRST COMBINATION OF DIGIT SIGNALS, A SIGNAL GENERATOR FOR GENERATING A SECOND COMBINATION OF DIGIT SIGNALS, SAID SIGNAL GENERATOR INCLUDING A PLURALITY OF LOGIC UNITS CONNECTED IN CASCADE, EACH SAID LOGIC UNIT PRODUCING AN OUTPUT IN RESPONSE TO AN INPUT SIGNAL AND THE OUTPUT FROM THE PRECEDING LOGIC UNIT IN THE CASCADED SERIES, A COMPARATOR FOR PROVIDING AN OUTPUT SIGNAL UPON ACTUATION BY THE SUBSCRIBER IN RESPONSE TO A SATISFACTORY COMPARISON BETWEEN SAID FIRST AND SECOND COMBINATIONS OF DIGIT SIGNALS GROUPS TO PROVIDE A LOCK RELEASE SIGNAL, AND MEANS TO APPLY SAID RELEASE SIGNAL TO SAID SIGNAL GENERATOR TO REVISE SAID SECOND COMBINATION OF DIGIT SIGNALS.
Claim 2
Dependent Claim
120 words
A SECURITY SYSTEM COMPRISING AN INPUT REGISTER CONTROLLABLE BY A SUBSCRIBER TO PROVIDE A FIRST COMBINATION OF DIGIT SIGNALS, A SIGNAL GENERATOR FOR GENERATING A SECOND COMBINATION OF DIGIT SIGNALS, SAID SIGNAL GENERATOR INCLUDING A PLURALITY OF LOGIC UNITS CONNECTED IN CASCADE, EACH SAID LOGIC UNIT PRODUCING AN OUTPUT IN RESPONSE TO AN INPUT SIGNAL AND THE OUTPUT FROM THE PRECEDING LOGIC UNIT IN THE CASCADED SERIES, A COMPARATOR FOR PROVIDING AN OUTPUT SIGNAL UPON ACTUATION BY THE SUBSCRIBER IN RESPONSE TO A SATISFACTORY COMPARISON BETWEEN SAID FIRST AND SECOND COMBINATIONS OF DIGIT SIGNALS GROUPS TO PROVIDE A LOCK RELEASE SIGNAL, AND MEANS TO APPLY SAID RELEASE SIGNAL TO SAID SIGNAL GENERATOR TO REVISE SAID SECOND COMBINATION OF DIGIT SIGNALS.
References Cited (Backward Citations)
US2602116A
Cited
US2573349A
Cited
US2731620A
Cited
US2905926A
Cited
US2866962A
Cited
US3063468A
Cited
US3072146A
Cited
US3030015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |