Show have ra inroads suppressed lne ine eions washington V W P boreland Bo raland ex pert on railways ind nd safety devices for the interstate commerce commission announced monday he would begin an aa invest gation to determine whether manufacturing cc po rations lons and aall loads hae haie su presed inventions on appliances that wo id be valuable in preventing railroad accidents anven tors have charged that corporations bought valuable patents and sup pressed them to keep them out of corn com petition with ith inefficient appliances now in use |