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1367891
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Patent Grant
1367891
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Source
Patent Number
1,367,891
Date Filed
Not available
Date Issued
Tuesday, February 8, 1921
103 years ago
CPC
H01H9/185 - Fluorescent or phosphorescent symbols or distinguishing marks
US Classifications
378 - X-ray or gamma ray systems or devices
250 - Radiant energy
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