Title:
Hoisting apparatus for elevator platforms
United States Patent 2500539


Inventors:
Granath, John O. W.
Application Number:
US3131648A
Publication Date:
03/14/1950
Filing Date:
06/05/1948
Assignee:
Granath, John O. W.
Primary Class:
Other Classes:
187/408, 187/900
International Classes:
B66B9/187
View Patent Images:
US Patent References:
2419145Hoist1947-04-15
2292353Jack frame1942-08-11
0953205N/A1910-03-29
0802217N/A1905-10-17