Process for the production of tubular objects of prestressed concrete
United States Patent 2585446
US Patent References:
Reenforced-concrete pipe
- - 1413405
Method of forming faced concrete blocks
- - 1471990
Process of bonding new concrete formations to old concrete formations
- - 1570794
Composite pipe and method of making same
- - 1965748
Method and apparatus for the manufacture of hollow bodies of reenforced concrete
- - 2048253
Reenforced-concrete pipe
- - 1413405
Method of forming faced concrete blocks
- - 1471990
Process of bonding new concrete formations to old concrete formations
- - 1570794
Composite pipe and method of making same
- - 1965748
Method and apparatus for the manufacture of hollow bodies of reenforced concrete
- - 2048253
Inventors:
Emil, Edwin
Darre, Nilsen Nils
Darre, Nilsen Nils
Publication Date:
02/12/1952
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Assignee:
Emil, Edwin
Darre, Nilsen Nils
Darre, Nilsen Nils
Primary Class:
Other Classes:
264/228, 425/389, 264/573, 425/387.100, 264/516, 264/275, 264/512, 425/111
International Classes:
B28B21/62; B28B21/00
US Patent References: