Official Gazette of the United States Patent Office
United States. Patent Office
(See Brogan, Graham W. i Black. William M., Fresno, Calif. Calculating mcahine. 1,870,705 : Aug. 9. Blackhall, John B„ Highland Park, and H. S. Pardee, Rnvinia, 111. ; said Pardee assignor to said Blackhall. Railway car. 1,870,227 ; Aug. 9.