Patent US4129016A successfully refreshed from Google Patents.
Patent US3270438A successfully refreshed from Google Patents.
US3270438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing and monitoring apparatus
Assignee: RICH ENGINEERING Inc
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Filing: 1963-08-12
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Granted: 1966-09-06
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Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 Ephraim Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:08
CPC Classifications
G; G09; G09B; G09B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
TYPEWRITER SPEED AND RHYTHM INDICATING APPARATUS COMPRISING: PULSE GENERATING MEANS FOR GENERATING A UNIDIRECTIONAL PULSE OF STANDARD WIDTH AND AMPLITUDE EACH TIME THE OPERATOR DEPRESSED A TYPE OF KEY OR SPACER BAR, AVERAGING MEANS FOR PROVIDING A MEASUREMENT OF THE AVERAGE AREA OF THE WAVEFORM OF A SERIES OF PULSES OF THE OUTPUT OF SAID PULSE GENERATING MEANS OVER A GIVEN BASE PERIOD INCLUDING ONLY A SMALL NUMBER OF PULSES AT THE LOWEST TYPE RATE TO BE MEASURED, AND INDICATING MEANS FOR DISPLAYING SAID MEASUREMENT IN WORDS PER MINUTE, FOR INDICATING THE INSTANTANEOUS VARIATIONS IN TYPING SPEED AND RHYTHM.
Claim 2
Dependent Claim
99 words
TYPEWRITER SPEED AND RHYTHM INDICATING APPARATUS COMPRISING: PULSE GENERATING MEANS FOR GENERATING A UNIDIRECTIONAL PULSE OF STANDARD WIDTH AND AMPLITUDE EACH TIME THE OPERATOR DEPRESSED A TYPE OF KEY OR SPACER BAR, AVERAGING MEANS FOR PROVIDING A MEASUREMENT OF THE AVERAGE AREA OF THE WAVEFORM OF A SERIES OF PULSES OF THE OUTPUT OF SAID PULSE GENERATING MEANS OVER A GIVEN BASE PERIOD INCLUDING ONLY A SMALL NUMBER OF PULSES AT THE LOWEST TYPE RATE TO BE MEASURED, AND INDICATING MEANS FOR DISPLAYING SAID MEASUREMENT IN WORDS PER MINUTE, FOR INDICATING THE INSTANTANEOUS VARIATIONS IN TYPING SPEED AND RHYTHM.
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |