Colt, S. (1836-02-25).“Revolving Gun (9430X)”(search form and quicktime) United States Patent Office Database. United States Patent Office. 2006-11-19閲覧. (Alternate URL: US Patent Images - search on "X0009430")
patft.uspto.gov
Colt, S. (1836-02-25).“Revolving Gun (9430X)”(search form and quicktime) United States Patent Office Database. United States Patent Office. 2006-11-19閲覧. (Alternate URL: US Patent Images - search on "X0009430")