Colt Patents for Semi Automatic Pistols

Browning and Colt Patents Appearing on Pre-WWII Colt Semi-Automatic Pistols

Colt Model	Patent Date(s)	US Patent Number(s)
Note: Not all patent dates listed for a model will appear on that model. Some patent dates will be omitted on the earliest pistols while later pistols will typically have all the patent dates. On the Service Model Ace and the .22-.45 Conversion Unit, the patent numbers (not the dates) are visible on the left side of the slide.
1900 .38 ACP Sight Safety and Sight Safety Altered	April 20, 1897	580,923 \| 580,924 \| 580,926
1902 Sporting .38 ACP	April 20, 1897 September 9, 1902	580,923 \| 580,924 \| 580,926 708,794
1902 Military .38 ACP	April 20, 1897 September 9, 1902	580,923 \| 580,924 \| 580,926 708,794
1903 Pocket Hammer .38 ACP	April 20, 1897 September 9, 1902	580,923 \| 580,924 \| 580,926 708,794
1903 Pocket Hammerless .32 ACP	April 20, 1897 December 22, 1903	580,923 \| 580,924 \| 580,926 747,585
1905 .45 ACP	April 20, 1897 September 9, 1902 December 19, 1905	580,923 \| 580,924 \| 580,926 708,794 808,003
1907 .45 ACP	April 20, 1897 September 9, 1902 December 19, 1905	580,923 \| 580,924 \| 580,926 708,794 808,003
1908 Pocket Hammerless .380 ACP	April 20, 1897 December 22, 1903	580,923 \| 580,924 \| 580,926 747,585
1908 Vest Pocket .25 ACP	August 25, 1896 April 20, 1897 December 22, 1903 January 25, 1910 July 31, 1917	566,367 580,923 \| 580,924 \| 580,926 747,585 947,478 1,234,961
1909 .45 ACP	April 20, 1897 September 9, 1902 December 19, 1905	580,923 \| 580,924 \| 580,926 708,794 808,003
1910 .45 ACP	April 20, 1897 September 9, 1902 December 19, 1905	580,923 \| 580,924 \| 580,926 708,794 808,003
1911 OF U.S. ARMY	April 20, 1897 September 9, 1902 December 19, 1905 February 14, 1911 August 19, 1913	580,923 \| 580,924 \| 580,926 708,794 808,003 984,519 1,070,582
M1911A1 U.S. ARMY	April 20, 1897 September 9, 1902 December 19, 1905 February 14, 1911 August 19, 1913	580,923 \| 580,924 \| 580,926 708,794 808,003 984,519 1,070,582
.22 Target and Woodsman	December 22, 1903 August 27, 1918 September 3, 1918	747,585 1,276,716 1,277,379
Government Model .45 ACP	April 20, 1897 September 9, 1902 December 19, 1905 February 14, 1911 August 19, 1913	580,923 \| 580,924 \| 580,926 708,794 808,003 984,519 1,070,582
National Match .45 ACP	April 20, 1897 September 9, 1902 December 19, 1905 February 14, 1911 August 19, 1913	580,923 \| 580,924 \| 580,926 708,794 808,003 984,519 1,070,582
Super .38	April 20, 1897 September 9, 1902 December 19, 1905 February 14, 1911 August 19, 1913	580,923 \| 580,924 \| 580,926 708,794 808,003 984,519 1,070,582
Super Match .38	April 20, 1897 September 9, 1902 December 19, 1905 February 14, 1911 August 19, 1913	580,923 \| 580,924 \| 580,926 708,794 808,003 984,519 1,070,582
Ace .22 LR	April 20, 1897 September 9, 1902 December 19, 1905 February 14, 1911 August 19, 1913	580,923 \| 580,924 \| 580,926 708,794 808,003 984,519 1,070,582
Service Model Ace .22 LR	August 24, 1937	2,090,656 \| 2,090,657
.22-.45 Conversion	August 24, 1937	2,090,656 \| 2,090,657
.45-.22 Conversion	April 20, 1897 September 9, 1902 December 19, 1905 February 14, 1911 August 19, 1913	580,923 \| 580,924 \| 580,926 708,794 808,003 984,519 1,070,582

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January 2022