US3243510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low noise line keyer
Assignee: AT&T Teletype Corp
•
Filing: 1962-06-22
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Granted: 1966-03-29
•
Expires: 1982-06-22
Abstract
No abstract record available.
Inventors
- 👤 Charles R Winston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:31
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/20; H04L25/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A LOW NOISE SIGNAL GENERATOR FOR APPLYING SIGNALS TO A TRANSMISSION LINE, SAID GENERATOR INCLUDING ELECTRONIC SWITCHING MEANS CONNECTED IN SAID TRANSMISSION LINE FOR INCREASING AND DECREASING THE CURRENT FLOW THROUGH SAID LINE BETWEEN A MAXIMUM VALUE AND A MINIMUM VALUE IN RESPONSE TO SIGNALS REPRESENTING INFORMATION TO BE TRANSMITTED AND MEANS FOR MAINTAINING SAID MINIMUM VALUE OF CURRENT AT A VALUE OTHER THAN ZERO.
Claim 2
Dependent Claim
65 words
A LOW NOISE SIGNAL GENERATOR FOR APPLYING SIGNALS TO A TRANSMISSION LINE, SAID GENERATOR INCLUDING ELECTRONIC SWITCHING MEANS CONNECTED IN SAID TRANSMISSION LINE FOR INCREASING AND DECREASING THE CURRENT FLOW THROUGH SAID LINE BETWEEN A MAXIMUM VALUE AND A MINIMUM VALUE IN RESPONSE TO SIGNALS REPRESENTING INFORMATION TO BE TRANSMITTED AND MEANS FOR MAINTAINING SAID MINIMUM VALUE OF CURRENT AT A VALUE OTHER THAN ZERO.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |