Title:
Tower cranes
United States Patent 3084806


Inventors:
Frederick, Staples James
Application Number:
US19353662A
Publication Date:
04/09/1963
Filing Date:
05/09/1962
Assignee:
Frederick, Staples James
Primary Class:
Other Classes:
212/300
International Classes:
B66C23/34
View Patent Images:
US Patent References:
2831589Articulated boom for mobile crane1958-04-22
2383172Portable crane1945-08-21
Foreign References:
IT509657B
DE1001808B1957-01-31
DE1022778B1958-01-16
DE1075812B
DE1091304B1960-10-20