US3209351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identification interrogation system
Assignee: General Electric Co
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Filing: 1963-10-04
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Granted: 1965-09-28
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Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
- 👤 Richard K Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:48
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN AN IDENTIFICATION INTERROGATION SYSTEM COMPRISING A SIGNAL REPEATING DEVICE ASSOCIATED WITH EACH OBJECT TO BE IDENTIFIED, EACH SIGNAL REPEATING DEVICE HAVING A PLURALITY OF SELECTED PIEZOELECTRIC ELEMENTS, EACH OF A DIFFERENT PRESELECTED FREQUENCY RESPONSE, MEANS FOR INTERROGATING SAID SIGNAL REPEATING DEVICES WITH A SIGNAL SWEEPING A FREQUENCY RANGE COVERING THE FREQUENCY RANGE OF SAID SIGNAL REPEATING DEVICES TO OBTAIN A RESPONSE OF FREQUENCY IDENTIFIED SIGNALS, SAID INTERROGATING MEANS NORMALLY SWEEPING ONLY A PORTION OF SAID FREQUENCY RANGE, AND SENSING MEANS RESPONSIVE TO SENSING THE PRESENCE OF ONE OF SAID SIGNAL REPEATING DEVICES FOR ENABLING SAID INTERROGATING MEANS TO SWEEP THE TOTAL FREQUENCY RANGE OF SAID SIGNAL REPEATING DEVICES.
Claim 2
Dependent Claim
109 words
IN AN IDENTIFICATION INTERROGATION SYSTEM COMPRISING A SIGNAL REPEATING DEVICE ASSOCIATED WITH EACH OBJECT TO BE IDENTIFIED, EACH SIGNAL REPEATING DEVICE HAVING A PLURALITY OF SELECTED PIEZOELECTRIC ELEMENTS, EACH OF A DIFFERENT PRESELECTED FREQUENCY RESPONSE, MEANS FOR INTERROGATING SAID SIGNAL REPEATING DEVICES WITH A SIGNAL SWEEPING A FREQUENCY RANGE COVERING THE FREQUENCY RANGE OF SAID SIGNAL REPEATING DEVICES TO OBTAIN A RESPONSE OF FREQUENCY IDENTIFIED SIGNALS, SAID INTERROGATING MEANS NORMALLY SWEEPING ONLY A PORTION OF SAID FREQUENCY RANGE, AND SENSING MEANS RESPONSIVE TO SENSING THE PRESENCE OF ONE OF SAID SIGNAL REPEATING DEVICES FOR ENABLING SAID INTERROGATING MEANS TO SWEEP THE TOTAL FREQUENCY RANGE OF SAID SIGNAL REPEATING DEVICES.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |