Mode of signal responsive hearing aid apparatus

• US 3,396,245 A
• Filed: 12/09/1964
• Issued: 08/06/1968
• Est. Priority Date: 12/09/1964
• Status: Expired due to Term

• Current Assignee: Dean W. Flygstad
• Original Assignee: Dean W. Flygstad
• Inventors: Flygstad, Dean W.
• Application Number:
  US04/417,173
• Time in Patent Office: 1,336 Days
• US Class Current: 381/331
• CPC Class Codes: G02C 11/06 Hearing aids construction of hearing aids H04R25/00
• CPC Class Codes: H04M 1/215 by non-intrusive coupling means, e.g. acoustic couplers
• CPC Class Codes: H04M 1/2475 for a hearing impaired user
• CPC Class Codes: H04R 2225/61 Aspects relating to mechanical or electronic switches or control elements, e.g. functioning
• CPC Class Codes: H04R 25/43 Electronic input selection or mixing based on input signal analysis, e.g. mixing or selection between microphone and telecoil or between microphones with different directivity characteristics H04R25/407 takes precedence
• CPC Class Codes: H04R 25/554 using a wireless connection, e.g. between microphone and amplifier or using Tcoils
• CPC Class Codes: H04R 25/603 of mechanical or electronic switches or control elements

Claims