Patent #2612072, granted Sept. 30, 1952, for the DeArmond Dynasonic.
Patent #2612072, granted Sept. 30, 1952, for the DeArmond Dynasonic.
Patent #2612072, granted Sept. 30, 1952, for the DeArmond Dynasonic.
Patent #2612072, granted Sept. 30, 1952, for the DeArmond Dynasonic.
Patent #2612072, granted Sept. 30, 1952, for the DeArmond Dynasonic.
Patent #2612072, granted Sept. 30, 1952, for the DeArmond Dynasonic.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.
Patent # 03535968, issued Oct 27, 1970, to the Kaman Corporation.