|
US2554909A
|
Smudge resistant transfer sheet and process of making same |
Expired / Lapsed
|
1946-04-15 |
1951-05-29 |
0 |
Details
|
|
US2243078A
|
Transfer sheet and composition for producing reinkable impr… |
Expired / Lapsed
|
1938-02-04 |
1941-05-27 |
0 |
Details
|
|
US2165972A
|
Duplicating machine |
Expired / Lapsed
|
1937-06-28 |
1939-07-11 |
0 |
Details
|
|
US2071910A
|
Treating hectograph bands |
Expired / Lapsed
|
1935-12-09 |
1937-02-23 |
0 |
Details
|