ORIGINAL PRINTED PATENT APPLICATION NUMBER 15,527 FOR IMPROVEMENTS IN ADVERTISING DEVICES (1909)....(THE INVENTORS LIVED IN STOKE ON TRENT). : John and Alexander Campbell. (inventors). Alcock
Category : ORIGINAL PRINTED PATENT APPLICATION NUMBER 15,527 FOR IMPROVEMENTS IN ADVERTISING DEVICES (1909)....(THE INVENTORS LIVED IN STOKE-ON-TRENT). : John and Alexander Campbell. (inventors). Alcock