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