| Patent No. |
Title |
Status |
Filing Date |
Grant Date |
Claims |
Actions |
|
US2403291A
|
Damper |
Expired / Lapsed
|
1942-12-08 |
1946-07-02 |
0 |
Details
|
|
US2271010A
|
Ventilating apparatus |
Expired / Lapsed
|
1938-10-04 |
1942-01-27 |
0 |
Details
|
|
US2229747A
|
Air distributing device |
Expired / Lapsed
|
1939-02-23 |
1941-01-28 |
0 |
Details
|