Inventor: Grace H. Mack, Walter H. Jessel, Wm. E. Duffett
Inventor: Bernard S. Jurale
Inventor: John R. Larus, John R. Larus, Charles T. Larus
Inventor: Grace H. Mack, Walter H. Jessel, Jr., Wm. E. Duffett
Inventor: Grace H. Mack, Walter H. Jessel, Jr., Wm. E. Duffett
Inventor: William Pomeroy Thomson