Filed: March 6, 1963 Apparatus for Vibration Measurement and Analysis and for Determining Unbalance Characteristics of Rotors Including: Electronics… Owned by:IRD LLC Serial Number:72164052
Filed: May 27, 1968 VIBRATION INVESTIGATION AND MEASUREMENT SERVICES FOR CONTINUOUS AND PERIODIC MONITORING OF UNBALANCE IN ROTATING BODIES… Owned by:IRD LLC Serial Number:72299137