United States Patent 2985935
US Patent References:
Machine for forming building blocks
- - 2270829
Concrete block forming machine
- - 2308132
Method for making building blocks
- - 2366780
Brick or block molding machine
- - 2431034
Machine and method for molding concrete blocks or other products
- - 2685116
Machine for forming building blocks
- - 2270829
Concrete block forming machine
- - 2308132
Method for making building blocks
- - 2366780
Brick or block molding machine
- - 2431034
Machine and method for molding concrete blocks or other products
- - 2685116
Publication Date:
05/30/1961
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Primary Class:
Other Classes:
425/448, 425/444, 425/432, 425/452
International Classes:
B28B3/02
US Patent References:
| 2697263 | Machine for making cementitious blocks |
Foreign References:
| GB748464A |