| Patent No. |
Title |
Status |
Filing Date |
Grant Date |
Claims |
Actions |
|
US2330881A
|
Valve |
Expired / Lapsed
|
1940-08-02 |
1943-10-05 |
0 |
Details
|
|
US2222755A
|
Valve stem molding means |
Expired / Lapsed
|
1937-05-12 |
1940-11-26 |
0 |
Details
|
|
US1811166A
|
Check valve structure |
Expired / Lapsed
|
1930-04-14 |
1931-06-23 |
0 |
Details
|