US3099000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal monitor
Assignee: International Business Machines Corp
•
Filing: 1959-05-20
•
Granted: 1963-07-23
•
Expires: 1979-05-20
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Dunning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:15
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/19; H03K17/00; H03K17/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
IN COMBINATION, AN INDICATING DEVICE, MEANS INCLUDING ING A MANUAL SWITCH, A DELAY CIRCUIT AND A FIRST SEMICONDUCTOR SWITCH FOR CONNECTING THE INDICATING DEVICE TO A SOURCE OF ELECTRICAL ENERGY, AN ADDITIONAL SEMICONDUCTOR SWITCH ACTIVATED BY THE FIRST SEMICONDUCTOR SWITCH TO APPLY A FEED-BACK SIGNAL THERETO, A PROBE, CONTROL MEANS INCLUDING A SEMICONDUCTOR SWITCH CONNECTED FOR CONTROLLING THE FIRST SEMICONDUCTOR IN ACCORDANCE WITH VARIATIONS IN A VOLTAGE SIGNAL FROM ONE VOLTAGE LEVEL, MEANS INCLUDING A VOLTAGE DIVIDER CONNECTING THE PROBE TO SAID CONTROL MEANS, ADDITIONAL CONTROL MEANS INCLUDING ANOTHER SEMICONDUCTOR SWITCH CONNECTED FOR CONTROLLING SAID FIRST SEMICONDUCTOR SWITCH IN ACCORDANCE WITH VARIATIONS IN THE VOLTAGE SIGNAL FROM A DIFFERENT VOLTAGE LEVEL, AND ADDITIONAL VOLTAGE DIVIDER MEANS CONNECTING SAID ADDITIONAL CONTROL MEANS TO THE PROBE.
References Cited (Backward Citations)
US2637018A
Cited
US2422288A
Cited
US2561357A
Cited
US2590973A
Cited
US2882520A
Cited
US2958823A
Cited
US2851638A
Cited
US3021514A
Cited
US2995687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |