Title:
Steel permanent way for high speed railways
United States Patent 1998205


Inventors:
Karl, Roscher Ernst
Application Number:
US52357231A
Publication Date:
04/16/1935
Filing Date:
03/18/1931
Assignee:
Karl, Roscher Ernst
Primary Class:
Other Classes:
14/4
International Classes:
E01B25/08
View Patent Images: