FOLDING PORTABLE GIN POLE
Filed: February 7th, 1949 [Granted]
Patent Number: 2557192
June l9, 1951 G, D, ESTER 2,557,192. FOLDING PORTABLE GIN POLE Filed Feb. '7, 1949 /4 Y INVENTOR. 49 GROVER 0. LE/STER 4o I BY Patented June F3, ...
PORTABLE GIN POLE
Filed: September 22nd, 1936 [Granted]
Patent Number: 2128712
j A. J. NEFF PORTABLE GIN POLE Aug. 30, 1938. Filed Sept. 22, 1936 6 Sheets- Sheet 1 Aug. 30, 1938. A, J NEFF 2,128,712. ( PORTABLE GIN POLE Filed ...
Portable oil well derrick
Filed: February 3rd, 1954 [Granted]
Patent Number: US2863530A
(Cl. 189-l1) This invention relates to portable oil well derricks, and more particularly to those that are swung up to upright position with the help of a gin pole.
PORTABLE GIN POLE STRTTCTTTRE
Filed: May 1st, 1929 [Granted]
Patent Number: 1828973
1931- G. D. LEISTER PORTABLE GIN POLE STRUCTURE Filed May 1. 1929 IVIENTOR BY W W A TTORNE Y Patent d Oct. 27, 1931 ATENT OFFICE onovnnn .
Portable mast structure
Filed: October 9th, 1946 [Granted]
Patent Number: US2567795A
p 1951 H. J. WOOLSLAYER ET AL PORTABLE MAST STRUCTURE 2 Sheets- Sheet 1 Filed Oct. ... The gin pole has legs extending along the'lower pfqif 9 1 be.
Filed: July 3rd, 1940 [Granted]
Patent Number: US2275195A
H. J. MARTIN GIN POLE Filed July 3, 1940 2 Sheets-Sheet 1 Y Mem: 1 .fa/:0105 .... Apr 1, 1946, Jan 15, 1952, Isaacson Iron Works, Portable logging tower.
Portable oil well drilling apparatus
Filed: October 4th, 1963 [Granted]
Patent Number: US3201091A
It is among the objects of this invention to provide portable oil well drilling apparatus, ... 3, 5 and 8, are the feet of a reclining gin pole 48 that extends backward ...
Elevating device for raising gin poles on trucks
Filed: October 10th, 1947 [Granted]
Patent Number: US2493099A
Figure 1 is a top plan View of the body portion of a truck having gin poles mounted thereon .... Aug 22, 1979, Jun 30, 1981, Wright Darold L, Portable building ...