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Patents > National tech categories : FR 20.4 or USPC 244/45R & Number of text pages: 2-3

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Andrew Gaul, Jr. (3) · Benjamin Talbot Babbitt Hyde (3) · Ralph P. Fox (2)
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Benjamin Talbot Babbitt Hyde (3) · Andrew Gaul, Jr. (3) · Ralph P. Fox (2)
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