Enterprise Railway Equipment Co. v. Pullman Standard Car Mfg. Co.

LINDLEY, District Judge.

Plaintiff questions the propriety of a decree of the District Court finding invalid claims 10 and 13 of patent No. 1,537,050, and claim 9 of patent No. 1,537,051, both granted on May 5, 1925.1 Each relates to improvements in railway car construction.

*19Campbell, the patentee, after some six earlier attempts along the same line, applied for and obtained the patents; the claims thereof, with which we are concerned, being substantially the same. In patent No. 1,537,050 he carried forward his efforts to build a useful hopper car of maximum capacity within the dimensional…