中科微点-全球专利检索

  1. Login
  2. Sign Up
Invention Grant
US2159780A Automatic volume control 失效

  • Patent Title: Automatic volume control
  • Application No.: US10987336
    Application Date: 1936-11-09
  • Publication No.: US2159780A
    Publication Date: 1939-05-23
  • Inventor: CHITTICK KENNETH A
  • Applicant: RCA CORP
  • Assignee: RCA Corp
  • Current Assignee: RCA Corp
  • Priority: US10987336 1936-11-09; US70267433 1933-12-16
  • Main IPC: H03G3/22
  • IPC: H03G3/22
Automatic volume control
Public/Granted literature
Information query
Espacenet
Patent Agency Ranking
0/0