Identification of sound and like signals

• US 3,004,104 A
• Filed: 04/29/1954
• Issued: 10/10/1961
• Est. Priority Date: 04/29/1954
• Status: Expired due to Term

• Current Assignee: Frank Hembrooke Emil
• Original Assignee: Frank Hembrooke Emil
• Inventors: FRANK HEMBROOKE EMIL
• Application Number:
  US03/426,465
• Time in Patent Office: 2,721 Days
• US Class Current: 341/182
• CPC Class Codes: G01H 3/00 Measuring characteristics of vibrations by using a detector in a fluid G01H7/00, G01H9/00, G01H11/00 take precedence
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00891 embedded in audio data

Claims