 |
|||
 |
 Browse Inventors by induction date: 1981 Harold Stephen Black Negative Feedback Amplifier Chester F. Carlson Electrophotography (Xerox) / Instant Copying Charles Stark Draper Stabilizing Gyroscpic Nicolaus August Otto Gas-Motor Engine  |
    |
|
© 2000-2009 National Inventors Hall of Fame Foundation, Inc.