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001 | 18278 | ||
003 | OSt | ||
005 | 20190814091513.0 | ||
007 | t| | ||
008 | 190702s1974 xxu||||| |||| 00| 0 d | ||
110 | 1 | _aUnited States Patent Office <Washington> | |
245 | 0 | 0 |
_aQuestions and answers about patents : _banswers to questions frequently asked about patents |
264 | 1 |
_aWashington, _c1974 |
|
300 | _a14 S. | ||
650 |
_aPatentwesen _93556 |
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650 |
_aUSA _94716 |
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999 |
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