专利检索_ .防止接近线路的防护板或障碍物专利检索_ .防止接近线路的防护板或障碍物专利检索查询

子分类：

B61L29/023： ..{专用栏木}

序号	专利名	申请号	申请日	公开（公告）号	公开（公告）日	发明人
81	Automatic crossing gate	US2234435	1935-05-20	US2094094A	1937-09-28	CLARK RAYMOND G; SMITH JR MILTON; MCD DILLEY MORRIS

82	Railway crossing gate	US62500732	1932-07-27	US1997199A	1935-04-09	PRANGER LOUIS H

83	Safety gate	US68797033	1933-09-02	US1979369A	1934-11-06	WHELAN CUSHING WILLIAM; KENDRICK PALMER ROBERT

84	Automatic release mechanism for highway barriers	US61545432	1932-06-04	US1952234A	1934-03-27	BUTTE PAUL C

85	Railway crossing gate	US49687830	1930-11-20	US1945295A	1934-01-30	PRANGER LOUIS H

86	Signal lamp	US55641731	1931-08-11	US1945198A	1934-01-30	LARSON CARL H

87	Automatic gate	US52390831	1931-03-19	US1888057A	1932-11-15	VINCENT ORVILLE L

88	Gate	US45168230	1930-05-12	US1886719A	1932-11-08	OAKS ALBERT J; OAKS WALLACE E

89	Crossing-gate-signal switch	US65142123	1923-07-13	US1717442A	1929-06-18	EVERETT EDWARD A

90	Railway gate and signal	US11201326	1926-05-27	US1659805A	1928-02-21	CABLE EDNA J

91	Safety device	US2336425	1925-04-15	US1626077A	1927-04-26	GAGE CHARLES H

92	Railroad-crossing gate	US75696224	1924-12-19	US1605167A	1926-11-02	BUNKER GEORGE W; BUNKER CELESTIA J

93	Saefty railway gate	US70132724	1924-03-24	US1600051A	1926-09-14	LEWIS LEONARD

94	Gate	US56926022	1922-06-19	US1563266A	1925-11-24	LEE DURHAM ROBERT

95	Guard and signal for railways, etc.	US50582221	1921-10-06	US1477438A	1923-12-11	GOOKIN ALBERT T

96	Railway-gate-actuating apparatus	US41574520	1920-10-09	US1447506A	1923-03-06	GAGE BECK FRANKLIN; DOUGLAS SAUNDERS WILLIAM

97	Cattle guard	US48424621	1921-07-12	US1442495A	1923-01-16	ALEXANDER RANKIN JOHN

98	Signal apparatus	US16667317	1917-05-05	US1424859A	1922-08-08	TABB WARNER T

99	Danger signal	US8617516	1916-03-23	US1420345A	1922-06-20	JOSEPHINE SHUMAN Y; DUNKER CHARLES H

100	Gate fob	US1404988D		US1404988A	1922-01-31

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