Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B27
WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
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B27M
WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
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3/00
Manufacture or reconditioning of specific semi-finished or finished articles
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B27M3/02
of roofing elements, e.g. shingles
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