Method of and apparatus for determining travel time of signals

• US 2,688,124 A
• Filed: 02/27/1953
• Issued: 08/31/1954
• Est. Priority Date: 02/27/1953
• Status: Expired due to Term

• Current Assignee: Doty William E N, John M. Crawford
• Original Assignee: Doty William E N, John M. Crawford
• Inventors: DOTY WILLIAM E N, Crawford, John M.
• Application Number:
  US03/339,374
• Time in Patent Office: 550 Days
• US Class Current: 367/41
• CPC Class Codes: G01V 1/366 by correlation of seismic signals
• CPC Class Codes: G01V 1/375 Correlating received seismic signals with the emitted source signal
• CPC Class Codes: G01V 2210/32 Noise reduction
• CPC Class Codes: G04F 10/06 by measuring phase G04F10/005 takes precedence
• CPC Class Codes: G06G 7/1914 using a magnetic medium, a linear filter

Claims