|
US3835657A
|
Carbon dioxide extruded pellets |
Expired / Lapsed
|
1971-10-26 |
1974-09-17 |
0 |
Details
|
|
US3618330A
|
Solidified gas filter |
Expired / Lapsed
|
1968-09-12 |
1971-11-09 |
0 |
Details
|
|
US2624365A
|
Pilot controlled valve for fire extinguishing systems |
Expired / Lapsed
|
1948-11-18 |
1953-01-06 |
0 |
Details
|
|
US2509497A
|
Smoke detector |
Expired / Lapsed
|
1947-09-08 |
1950-05-30 |
0 |
Details
|
|
US2445163A
|
Fluid pressure operated valve |
Expired / Lapsed
|
1942-09-28 |
1948-07-13 |
0 |
Details
|