Improvement in hand and foot plates for swimming – US Patent Office – Patent No. 183,045 – Robert H. W. Dunlop – June 23, 1876

United States Patent Office Robert H. W. Dunlop, of Kent Gardens, Ealing, England. Improvement in hand and foot plates for swimming Specification forming part of Letters Patent No. 183,045 Dated: October 10, 1876 application filed: June 23, 1876