1849 – Diving Bell – Avery Richards and John Walcott (American)
1849 – Diving Bell – Avery Richards and John Walcott Deep-sea-diving bell Publication number US6250 A Publication type Grant Publication date Apr 3, 1849 Inventors J. Avery Richards and John W. Walcott Description To all whom t may concern Be it known that we, J. AVERY RICHARDS and JOHN W. WALCOTT, of Boston, in …
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