US3228120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational device
Assignee: Holland Electronics Inc
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Filing: 1961-08-18
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Granted: 1966-01-11
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Expires: 1981-08-18
Abstract
No abstract record available.
Inventors
- 👤 Edward M Farrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:56
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A DEVICE DESIGNED FOR TEACHING THE MORSE CODE CHARACTERS INCLUDING THE TWENTY-SIX LETTERS OF THE ALPHABET AND TEN NUMBERS COMPRISING A FLAT PRINTED CIRCUIT PLATE MEMBER, INCLUDING A PLURALITY OF CONCENTRIC RINGS, EACH OF SAID RINGS INCLUDING A PLURALITY OF ELECTRICAL CONTACTS AND A COMMON CONTACT, SAID ELECTRICAL CONTACTS BEING DIMENSIONED AND SPACED TO CORRESPONDING TO DOTS AND DASHES OF THE MORES CODE AND ARRANGED TO CORRESPOND TO INDIVIDUAL MORES CODE CHARACTERS, SAID CHARACTERS BEING ARRANGED INTO SIX DIFFERENT GROUPS WITH SIX CHARACTERS IN EACH GROUP, THE ELECTRICAL CONTACTS ASSOCIATED WITH EACH GROUP OF CHARACTERS BEING DISPOSED ON A DIFFERENT RING OF SAID PLURALITY OF CONCENTRIC RINGS, A PLURALITY OF BRUSH ELEMENTS DISPOSED TO ENGAGE THE CONTACTS OF SAID PLURALITY OF RINGS, A SOURCE OF POWER, A BUZZER, A SELECTOR SWITCH
Claim 2
Independent Claim
131 words
A DEVICE DESIGNED FOR TEACHING THE MORSE CODE CHARACTERS INCLUDING THE TWENTY-SIX LETTERS OF THE ALPHABET AND TEN NUMBERS COMPRISING A FLAT PRINTED CIRCUIT PLATE MEMBER, INCLUDING A PLURALITY OF CONCENTRIC RINGS, EACH OF SAID RINGS INCLUDING A PLURALITY OF ELECTRICAL CONTACTS AND A COMMON CONTACT, SAID ELECTRICAL CONTACTS BEING DIMENSIONED AND SPACED TO CORRESPONDING TO DOTS AND DASHES OF THE MORES CODE AND ARRANGED TO CORRESPOND TO INDIVIDUAL MORES CODE CHARACTERS, SAID CHARACTERS BEING ARRANGED INTO SIX DIFFERENT GROUPS WITH SIX CHARACTERS IN EACH GROUP, THE ELECTRICAL CONTACTS ASSOCIATED WITH EACH GROUP OF CHARACTERS BEING DISPOSED ON A DIFFERENT RING OF SAID PLURALITY OF CONCENTRIC RINGS, A PLURALITY OF BRUSH ELEMENTS DISPOSED TO ENGAGE THE CONTACTS OF SAID PLURALITY OF RINGS, A SOURCE OF POWER, A BUZZER, A SELECTOR SWITCH
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |