|
US3016744A
|
|
Hygrometer
|
|
US2297353A
|
|
Lumber
|
|
US2300728A
|
|
Method of manufacturing lumber
|
|
US2198245A
|
|
Method of manufacturing lumber
|
|
US2094885A
|
|
Briquette machine
|
|
US1663982A
|
|
Method and means for economically drying by air circulation
|
|
US1541350A
|
|
Method and means for drying lumber
|
|
US1541349A
|
|
Method and means for drying lumber
|
|
US1252428A
|
|
Art of preserving wood.
|
|
US1219388A
|
|
Art of impregnating timber and other material with a preservative.
|
|
US1167492A
|
|
Art of impregnating timber and other porous material with a preservative.
|
|
CA353867A
|
|
Lumber
|
|
CA414795A
|
|
Lumber manufacture
|
|
CA267598A
|
|
Spark arrester
|
|
CA380895A
|
|
Lumber manufacture
|
