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| Patents for Viggo Berthelsen | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,627,289 | Feb. 03, 1953 | V. Berthelsen | Hydraulic press | veneer machines | |
| 2,627,290 | Feb. 03, 1953 | V. Berthelsen | Press, especially a veneering press | veneer machines | |
| 2,784,754 | Mar. 12, 1957 | V. Berthelsen | Hydraulic systems | veneer machines | |
| 2,827,552 | Mar. 18, 1958 | V. Berthelsen | Platen construction method | veneer machines | |
| 3,470,598 | Oct. 07, 1969 | V. Berthelsen | Method of making structural elements | ||