US3221250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital frequency meter
Assignee: Wang Laboratories Inc
•
Filing: 1962-11-02
•
Granted: 1965-11-30
•
Expires: 1982-11-02
Abstract
No abstract record available.
Inventors
- 👤 Wang An
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/124
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
APPARATUS FOR MEASURING THE FREQUENCY OF CYLICNAL SIGNALS COMPRISING A SOURCE OF CHECK SIGNALS HAVING A FREQUENCY MUCH GREATER THAN THE FREQUENCY OF THE CYLICAL SIGNALS, MEANS TO RECORD THE NUMBER OF CYCLES OF SAID CHECK SIGNALS AND THE NUMBER OF CYCLES OF SAID CYLICAL SIGNALS FOR A PRE-ESTABLISHED PERIDO PLUS THE TIME REQUIRED FOR THE COMPLETION OF THE CYCLE OF SAID CYCLICAL SIGNALS, MEANS TO ADJUST THE RECORDED VALUES OF SAID CHECK SIGNAL CYCLES AND SAID CYCLICAL SIGNAL CYCLES AT RATES PROPORTIONAL TO SAID VALUES, AND MEANS TO READ OUT THE ADJUSTED VALUE OF THE CYCLICAL SIGNAL CYCLES WHEN THE ADJUSTED RECORDED VALUE OF SAID CHECK SIGNAL CYCLES REACHES A PRE-ESTABLISHED TERMINAL VALUE.
Claim 2
Dependent Claim
114 words
APPARATUS FOR MEASURING THE FREQUENCY OF CYLICNAL SIGNALS COMPRISING A SOURCE OF CHECK SIGNALS HAVING A FREQUENCY MUCH GREATER THAN THE FREQUENCY OF THE CYLICAL SIGNALS, MEANS TO RECORD THE NUMBER OF CYCLES OF SAID CHECK SIGNALS AND THE NUMBER OF CYCLES OF SAID CYLICAL SIGNALS FOR A PRE-ESTABLISHED PERIDO PLUS THE TIME REQUIRED FOR THE COMPLETION OF THE CYCLE OF SAID CYCLICAL SIGNALS, MEANS TO ADJUST THE RECORDED VALUES OF SAID CHECK SIGNAL CYCLES AND SAID CYCLICAL SIGNAL CYCLES AT RATES PROPORTIONAL TO SAID VALUES, AND MEANS TO READ OUT THE ADJUSTED VALUE OF THE CYCLICAL SIGNAL CYCLES WHEN THE ADJUSTED RECORDED VALUE OF SAID CHECK SIGNAL CYCLES REACHES A PRE-ESTABLISHED TERMINAL VALUE.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |