Membership
Tour
Register
Log in
Charles L. Johnson
Follow
Person
Cambridge, MA, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Music instrument which generates a rhythm EKG
Patent number
5,723,802
Issue date
Mar 3, 1998
Virtual Music Entertainment, Inc.
Charles L. Johnson
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Music instrument which generates a rhythm EKG
Patent number
5,491,297
Issue date
Feb 13, 1996
Ahead, Inc.
Charles L. Johnson
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Virtual music system
Patent number
5,393,926
Issue date
Feb 28, 1995
Ahead, Inc.
Charles L. Johnson
G10 - MUSICAL INSTRUMENTS ACOUSTICS