Barbara A. Allen

Person

  • Bloomington, IN, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Kettledrum

    • Patent number 4,730,531
    • Issue date Mar 15, 1988
    • Barbara A. Allen
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    Kettledrum

    • Patent number 4,674,390
    • Issue date Jun 23, 1987
    • Barbara A. Allen
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS
  • Information Patent Grant

    Kettledrum

    • Patent number 4,635,524
    • Issue date Jan 13, 1987
    • Barbara A. Allen
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS