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：

序号	专利名	申请号	申请日	公开（公告）号	公开（公告）日	发明人
101	Railway-gate	US40031020	1920-07-31	US1383437A	1921-07-05	SPURLOCK THEADORE M; SPRAGUE JAMES A

102	Signal for railway-crossing gates	US26566818	1918-12-06	US1374027A	1921-04-05	NOESKE ELMER O

103	Device for stopping high-power vehicles	US31965519	1919-08-25	US1332237A	1920-03-02	STRAUSS JOSEPH B

104	Gate.	US1912729999	1912-11-07	US1079283A	1913-11-18	AKRE JOHN J

105	Safety-gate.	US1909529388	1909-11-22	US979458A	1910-12-27	FREAK GEORGE R

106	Farm-gate.	US1904211851	1904-06-09	US770317A	1904-09-20	ROLLINS LEWIS P

107	Farm-gate.	US1903162296	1903-06-19	US745663A	1903-12-01	PURSELL BENJAMIN H

108	Gate.	US1900009557	1900-03-21	US652760A	1900-07-03	ENGLEBRIGHT FREDERICK A

109	Gate for bridge approaches	US554767D		US554767A	1896-02-18

110	Sylvester l	US463452D		US463452A	1891-11-17

111	Signal for railway-crossings	US443124D		US443124A	1890-12-23

112	Safety-gate for draw-bridges	US418027D		US418027A	1889-12-24

113	Signal-light	US406539D		US406539A	1889-07-09

114	piper	US347640D		US347640A	1886-08-17

115	tobey	US296893D		US296893A	1884-04-15

116	Blind and shutter	US287712D		US287712A	1883-10-30

117	Safety	US276564D		US276564A	1883-05-01

118	Improvement in adjustable gates	US219804D		US219804A	1879-09-23

119	Improvement in gates	US122973D		US122973A	1872-01-23

120	Improvement in signaling devices for railroads	US119456D		US119456A	1871-10-03

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