visibility Similar

code Related

Patent drawing - Original Hydril Annular BOP Patent Public domain image

description

Summary

Patent Drawing of the Original Annular-type Blowout Preventer, by Hydril Corporation,

U.S. Patent 2,609,836 (1952).

label_outline

Tags

patents patent drawings us patent office high resolution inventions
date_range

Date

16/08/1946
create

Source

USPTO
link

Link

http://uspto.gov/
copyright

Copyright info

public domain

label_outline Explore Us Patent Office, Patent Drawings, Patents

Topics

patents patent drawings us patent office high resolution inventions