| Publication number: | US1721370
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| Publication date: | 1929-07-16
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| Inventor: | BISHOP BOUGHTON EDWARD
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| Applicant: |
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| Classification: |
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| - international: | F16D51/52; F16D51/00;
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| - European: |
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| Application number: | US19280300002 19280816
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| Priority number(s): | GBX1721370 19270628
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