Boe v. Marvel Equipment Co.

DONAHUE, Circuit Judge.

This appeal involves the question of the validity, and if valid the infringement, of claims 5, 7, 8, and 9 of United States reissue letters patent No. 15,427, to Hans M. Boe. The object of the claimed invention is to provide an attachment for a grease or oil tank or container by means of which lubricants can ho drawn, out of a tank and discharged through a suitable nozzle into a bearing, differential, or any other device where the lubricating material is needed. The record also presents the further question of intervening rights acquired by the appellees prior to tho…