US3329894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual auto correlation method to distinguish wanted signal from noise
Assignee: Individual
•
Filing: 1951-08-17
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Granted: 1967-07-04
•
Expires: 1971-08-17
Abstract
No abstract record available.
Inventors
- 👤 George F Asbury
- 👤 Earl J Kohn
- 👤 James R Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:39
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/02; H03D1/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A METHOD OF DETECTING A RADIATING SOURCE OF A PARTICULAR FREQUENCY WHICH MAY BE RADIATING AT A LEVEL LOWER THAN AMBIENT NOISE, SAID DETECTION BEING MADE ON A VISUAL DISPLAY CAPABLE OF RECORDING TIME AND INTENSITY MODULATION, COMPRISING THE STEPS OF CONTINUOUSLY RECORDING WITH RESPECT TO TIME ALL SIGNALS EMANATING FROM THE DIRECTION OF THE RADIATING SOURCE, DIVIDING SAID RECORDING INTO SEGMENTS OF EQUAL LENGTH SUCH THAT THE SEGMENT LENGTH IS APPROXIMATELY HARMONICALLY RELATED TO THE PERIOD OF THE PARTICULAR FREQUENCY, AND POSITIONING SAID SEGMENTS IN SEQUENTIAL JUXTAPOSITION WHEREBY THE COHERENCE OF SIGNALS INCLUDING LOWER THAN NOISE LEVEL SIGNALS RECURRING AT THE PARTICULAR FREQUENCY WILL PRODUCE A VISUAL LINE ACROSS SAID SEGMENTS.
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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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |