Document - MCCOLL, RANKIN AND STANISTREET COLLECTION: S MCDONALD PATENT WATER TRAP, 1950's

Physical description

A 'Loop Cobra'Binder File containing documentation re. the Stuart McDonald Patent Water Trap. Australian Patent No. 132,110. Includes letters about whether the patent has expired or needs renewing, the formation of a Company with the name Stuart McDonald Patent Water Trap and receipts from companies that had already purchased the trap

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