
US Patent No: D304175
Number of patents in Portfolio can not be more than 2000
Input/output terminal
Stats
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Oct 24, 1989
Issued date -
Nov 26, 1986
filing date -
06/935,532
serial no -
Expired
status
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Abstract
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First Claim
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International Classification(s)
- International Classification not provided for expired patents
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| D263969 Electronic dictionary | 9 | 1980 | |
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| D278916 Calculator for highway travel | 6 | 1983 | |
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| D260646 Combined radio, clock and calculator | 19 | 1979 | |
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| D280217 Talking mathematics trainer | 27 | 1983 | |
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| D258956 Portable data entry terminal | 67 | 1979 | |
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| D279109 Calculator | 12 | 1983 | |
Patent Citation Ranking
- Citation Ranking not provided for expired patents