Inventor: Anderson, Frederic W.
Inventor: Merrill, deceased, Grant, Merrill, executrix, by Lucile B.
Inventor: Armstrong, David L.
Inventor: Swim, Herbert C.
Inventor: Stetler, James R.
Inventor: Anderson, Frederic W.
Inventor: Sand, Theodore K.
Inventor: Tremmel, John P., Tremmel, Minnie K.
Inventor: Tremmel, John P., Tremmel, Minnie K.