Perforating devices
United States Patent 2796833
US Patent References:
Gun perforator
- - 2252996

Perforator gun
- - 2358951

Cartridge loading
- - 2440568

Radioactive marker
- - 2592434


Inventors:
Sweetman, William G.
Publication Date:
06/25/1957
View Patent Images:
Download PDF 2796833 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Sweetman, William G.
Primary Class:
102/306
International Classes:
E21B43/116; F42B1/028; E21B43/11; F42B1/00
Foreign References:
GB573078A
GB574132A
FR1002092A