|
US2602754A
|
Production of high-temperature heat insulating material |
Expired / Lapsed
|
1948-12-18 |
1952-07-08 |
2 |
Details
|
|
US2253916A
|
Clip fastener for corrugated sheets |
Expired / Lapsed
|
1940-09-10 |
1941-08-26 |
0 |
Details
|
|
US1871707A
|
Material handling apparatus |
Expired / Lapsed
|
1930-06-27 |
1932-08-16 |
0 |
Details
|
|
US1847707A
|
Asbestos-cement shingle |
Expired / Lapsed
|
1928-10-22 |
1932-03-01 |
0 |
Details
|