We decided this appeal originally in 1935 (2 Cir.,
This block was apparently the result of an intensive study by the plaintiff’s engineers during the year 1923, though we do not understand that they devoted themselves exclusively to it, because out of their labor also appeared the “breaker-arm” patented in Kroeger’s second patent, No. 1,593,339. The situation is one frequent enough in patents, where the prior art presses close to the invention, but never quite attains it; and where the answer as to whether the final step justified a patent, depends upon what led up to it and what followed. In the case at bar the short period between the appearance of Delco arm, 15,-377, and the application for the patent — two years and four months — does not á priori encourage us to suppose that the apparently short and easy step between the two demanded outstanding talents. Nor are we impressed with the argument drawn from the work of the plaintiff’s engineers during 1923. For all that appears, this may have been no more than that of competent experts proceeding by trial and error. Difficulties had been experienced with Delco arm, 15,377, because the metal arm broke which held the block, and it surely did not require high ingenuity to think of using a block made out of the same material (Bakelite, reinforced with fibres running perpendicular to the “breaker-arm”) but moulded like Schwarze, and like his block, riveted directly to the arm. True, Kroeger did more than that, for he made the threads follow the turn of the block; and if he had not, it might well have been fatally weak just at the turn, though no more than Schwarze. That expedient as such was, however, old, for Talley (Pat. No. 1,341,685) had already
Decree reversed; bill dismissed.
