United States Patent 3426404
Inventors:
Yamasita, Keniti
Yamasita, Zyozi
Publication Date:
02/11/1969
Assignee:
Keniti, Yamasita
Zyozi, Yamasita
Other Classes:
425/421, 425/432, 425/434, 425/422, 425/424, 425/453
International Classes:
B28B3/02; B28B1/08
US Patent References:
| 2227756 | Building block casting machine | | | |
| 2235440 | Molding apparatus | | | |
| 2526198 | Machine for molding concrete blocks | | | |
| 2542584 | Concrete block molding machine | | | |
| 2583597 | Concrete block molding machine | | | |
| 3277551 | Concrete block molding machines | | | |