The Keiselman Resuscitator Model 110 was patented by Joseph Kreiselman in 1946 (filed in 1944), and used by the U.S. Army during and after WWII.  It featured a hand-pumped bellows and a removable elbow joint to accomodate the position of the patient.  The curved metal piece included in the kit was to insert into the patient's throat in order to clear the airway.  The Keiselman Resuscitator Model 110 was made by The Ohio Chemical & Mfg. Co. in Cleveland Ohio, while the later Model 115 was produced in Madison Wisconsin.