Operating valve
United States Patent 2589794
US Patent References:
/0068249.html
- - 0068249
/0270334.html
- - 0270334
/0380257.html
- - 0380257
/0696329.html
- - 0696329
/1014501.html
- - 1014501
/0068249.html
- - 0068249
/0270334.html
- - 0270334
/0380257.html
- - 0380257
/0696329.html
- - 0696329
/1014501.html
- - 1014501
Inventors:
Frantz, Virgil L.
Publication Date:
03/18/1952
View Patent Images:
Export Citation:
Assignee:
Frantz, Virgil L.
Primary Class:
Other Classes:
251/63, 291/16, 291/3, 303/48, 137/625.330
International Classes:
B61C15/10; B61C15/00