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| Patents for Negbaur | |||||
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| Picture | Number | Date | Patentee | Title | |
 | D78,554 | May 21, 1929 | M.D. Avillar | Design For A Bottle-Seal Opener | |
 | 2,010,326 | Aug. 06, 1935 | J.R. Schuchardt | Novelty bottle opener | |