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| All Patents in class 156/433 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,445,313 | May 20, 1969 | V.H. Clausen, A. Zweig | Making composite veneer sheets | veneer machines | |
| RE28,627 | Nov. 25, 1975 | V.H. Clausen, A. Zweig | Making composite veneer sheets | plywood making machines | |