Building units and construction elements – Structure – Simulative
Patent
1975-07-29
1976-12-21
Burke, Wallace R.
Building units and construction elements
Structure
Simulative
D2501
Patent
active
D02428024
REFERENCES:
patent: 1804753 (1931-05-01), Douglas
patent: D157633 (1950-03-01), Sanders
patent: D212750 (1968-11-01), Claussen
Burke Wallace R.
Certain-Teed Corporation
Jones Larry
Sites Edward J.
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