| Patent No. |
Title |
Status |
Filing Date |
Grant Date |
Claims |
Actions |
|
US2005615A
|
Ventilating means |
Expired / Lapsed
|
1933-07-31 |
1935-06-18 |
0 |
Details
|
|
US1975316A
|
Ventilator |
Expired / Lapsed
|
1932-05-11 |
1934-10-02 |
0 |
Details
|
|
US1924489A
|
Ventilating apparatus |
Expired / Lapsed
|
1932-02-06 |
1933-08-29 |
0 |
Details
|
|
US1914913A
|
Pig pen |
Expired / Lapsed
|
1932-06-08 |
1933-06-20 |
0 |
Details
|