US1967920A
|
|
Method and blank for making film spools
|
US1942952A
|
|
Construction of spools
|
US1985760A
|
|
Spool and method for its manufacture
|
US1942951A
|
|
Spool for photographic films
|
US1931219A
|
|
Spool for photographic films
|
US1892717A
|
|
Spool for photographic films
|
US1825044A
|
|
Metal spool
|
US1794054A
|
|
Metallic spool
|
US1748859A
|
|
Metal spool and the like
|
US1577202A
|
|
Spool for photographic-camera films and similar purposes
|
US1599271A
|
|
Spool for photographic camera films and similar purposes
|