子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 241 | Receiver and trigger-plate construction for firearms | US42944942 | 1942-02-04 | US2325646A | 1943-08-03 | WILLIAMS DAVID M |
| 242 | Bolt-action firearm | US29518839 | 1939-09-16 | US2290778A | 1942-07-21 | SWEBILIUS CARL G |
| 243 | Automatic pistol | US911735 | 1935-03-02 | US2139203A | 1938-12-06 | GABRIEL PETTER CHARLES |
| 244 | Firearm | US7595036 | 1936-04-23 | US2102332A | 1937-12-14 | GEORGE NORMAN |
| 245 | Take-down firearm | US8547636 | 1936-06-16 | US2100410A | 1937-11-30 | EDWIN PUGSLEY |
| 246 | Repeating firearm | US75586934 | 1934-12-04 | US2050038A | 1936-08-04 | JOHN BROWNING |
| 247 | Firearm | US57037531 | 1931-10-22 | US1928871A | 1933-10-03 | SWEBILIUS CARL G |
| 248 | Semiautomatic rifle | US44607930 | 1930-04-21 | US1892141A | 1932-12-27 | GARAND JOHN C |
| 249 | Rifle | US49903030 | 1930-11-29 | US1866722A | 1932-07-12 | PEDERSEN JOHN D |
| 250 | Firearm | US50416430 | 1930-12-22 | US1844779A | 1932-02-09 | MESSENIE PAUL A |
| 251 | Airgun | US24733328 | 1928-01-17 | US1830763A | 1931-11-10 | LOOMIS CRAWFORD C |
| 252 | Automatic firearm | US41657229 | 1929-12-26 | US1825904A | 1931-10-06 | KARL HEINEMANN |
| 253 | Sporting gun | US4909325 | 1925-08-08 | US1618247A | 1927-02-22 | VON FROMMER RUDOLF |
| 254 | Automatic rifle | US29720119 | 1919-05-15 | US1572450A | 1926-02-09 | GUSTAF SWEBILIUS CARL |
| 255 | Self-loading pistol | US66911423 | 1923-10-17 | US1548236A | 1925-08-04 | FRITZ ZEHNER |
| 256 | Firearm | US44802221 | 1921-02-26 | US1511509A | 1924-10-14 | DIEHM LUCIUS N |
| 257 | Automatic pistol | US49667921 | 1921-08-29 | US1449566A | 1923-03-27 | FRITZ WALTHER |
| 258 | Automatic pistol | US27092619 | 1919-01-13 | US1430662A | 1922-10-03 | LEWIS ISAAC N |
| 259 | Recoil-loading pistol | US47620821 | 1921-06-16 | US1427966A | 1922-09-05 | JOSEF NICKL |
| 260 | Automatic pistol | US30944319 | 1919-07-08 | US1427413A | 1922-08-29 | NICOLAS PIEPER |
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