Patent US4259668A successfully refreshed from Google Patents.
US4259668A
Expired / Lapsed
US
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Television set/calculator interface including exchangeable keyboard panel and program memory cartridge
Assignee: J&I INDUSTRIES Inc
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Filing: 1979-05-14
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Granted: 1981-03-31
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Expires: 1999-05-14
Abstract
Abstract A combined home-use-television set/calculator electronic system comprising a control unit for conducting arithmetic calculations and for displaying calculation results on an image screen of the home-use-television set. A keyboard unit is exchangeably connected to the control unit for increasing operation abilities of the combined home-use-television set/calculator electronic system. A read only memory cartridge is exchangeably secured to the control unit. A read only memory corresponding to a selected keyboard unit is secured to the control unit for developing operation instruction signals which are required for performing the arithmetic calculations associated with the selected keyboard unit.
Inventors
- 👤 Kosuke Nishimura
- 👤 Hirohide Nakagawa
- 👤 Isamu Haneda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:54
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/02; G06F15/0225
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A combined home-use-television set/calculator system comprising: a control unit including: central processor means for conducting arithmetic calculations; and display control means for displaying calculation results derived from said central processor means on an image screen of the home-use-television set; a memory cartridge exchangeably secured to said control unit; and a keyboard unit exchangeably connected and secured to said control unit for introducing desired information into said central processor means, wherein a specific memory and a specific keyboard unit are selected to operatively function relative to each other.
Claim 2
Dependent Claim
87 words
A combined home-use-television set/calculator system comprising: a control unit including: central processor means for conducting arithmetic calculations; and display control means for displaying calculation results derived from said central processor means on an image screen of the home-use-television set; a memory cartridge exchangeably secured to said control unit; and a keyboard unit exchangeably connected and secured to said control unit for introducing desired information into said central processor means, wherein a specific memory and a specific keyboard unit are selected to operatively function relative to each other.
Claim 3
Dependent Claim
33 words
The combined home-use-television set/calculator system of claim 1, wherein said memory cartridge stores a program sequence of a specific operation, of which an output signal controls the operations of said central processor means.
Claim 4
Dependent Claim
18 words
The combined home-use-television set/calculator system of claim 2, wherein said memory cartridge comprises a read only memory cartridge.
Claim 5
Dependent Claim
25 words
The combined home-use-television set/calculator system of claim 2, wherein said memory cartridge comprises either a read only memory cartridge or a random access memory cartridge.
Claim 6
Dependent Claim
31 words
The combined home-use-television set/calculator system of claim 4, wherein said control unit comprises a housing having an opening for accommodating said read only memory cartridge and said random access memory cartridge.
Claim 7
Dependent Claim
23 words
The combined home-use-television set/calculator system of claim 1, 2, 3, 4 or 5 further comprising a printer for printing out said calculation results.
Claim 8
Dependent Claim
28 words
The combined home-use-television set/calculator system according to claim 1, wherein a memory unit for storing the program sequence being operatively incorporated in the keyboard unit which is exchangeable.
Claim 9
Dependent Claim
26 words
The combined home-use-television set/calculator system according to claim 7, wherein the combined keyboard and memory unit being operatively stacked and bound together in a notebook fashion.
Claim 10
Dependent Claim
155 words
A combined home-use-television set/calculator system comprising: a control unit including: central processor means for conducting arithmetic calculations; and display control means for displaying calculation results derived from said central processor means on an image screen of the home-use-television set; a memory cartridge exchangeably secured to said control unit for storing a program sequence of a specific operation, of which an output signal controls the operations of said central processor means, said memory cartridge comprising either a read only memory cartridge or a random access memory cartridge; and a keyboard unit exchangeably connected and secured to said control unit for introducing desired information into said central processor means; said control unit having a housing with an opening for accommodating said read only memory cartridge and said random access memory cartridge and including detection means for detecting whether the memory cartridge accommodated within said opening is the read only memory cartridge or the random access memory cartridge.
Claim 11
Dependent Claim
155 words
A combined home-use-television set/calculator system comprising: a control unit including: central processor means for conducting arithmetic calculations; and display control means for displaying calculation results derived from said central processor means on an image screen of the home-use-television set; a memory cartridge exchangeably secured to said control unit for storing a program sequence of a specific operation, of which an output signal controls the operations of said central processor means, said memory cartridge comprising either a read only memory cartridge or a random access memory cartridge; and a keyboard unit exchangeably connected and secured to said control unit for introducing desired information into said central processor means; said control unit having a housing with an opening for accommodating said read only memory cartridge and said random access memory cartridge and including detection means for detecting whether the memory cartridge accommodated within said opening is the read only memory cartridge or the random access memory cartridge.
References Cited (Backward Citations)
US4063221A
Cited
US4037092A
Cited
US3911424A
Cited
US4026555A
Cited
US4095791A
Cited
US4143360A
Cited
US4117469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |