| Digest Nr | Subject and Author |
|---|
 |
| 2021.03.14.03 | Ampico Unit Valve Calibrating Machine Patent, from John Grant |
| 2021.03.12.05 | Ampico Unit Valve Calibrating Machine, from Gordon Stelter |
| 2021.03.11.03 | Ampico Unit Valve Calibrating Machine Patent, from John Grant |
| 2021.03.09.01 | Seek Ampico Unit Valve Calibrating Machine Patent, from John Grant |
| 2012.05.15.04 | Calibrating a Player Piano Tempo Indicator, from John Taber |
| 2012.05.04.03 | Calibrating a Player Piano Tempo Indicator, from John Phillips |
| 2012.04.02.07 | Calibrating a Player Piano Tempo Indicator, from Steve Bentley |
| 2012.04.01.04 | Calibrating a Player Piano Tempo Indicator, from John A. Tuttle |
| 2012.03.28.07 | Calibrating a Player Piano Tempo Indicator, from Spencer Chase |
| 2012.03.28.06 | Calibrating a Player Piano Tempo Indicator, from David Haibach |
| 2012.03.27.03 | Calibrating a Player Piano Tempo Indicator, from Ralph Nielsen |
| 2012.03.27.02 | Calibrating a Player Piano Tempo Indicator, from Julian Dyer |
| 2012.03.26.04 | Calibrating a Player Piano Tempo Indicator, from John Phillips |
| 2000.08.28.04 | Calibrating Solenoid Piano for MIDI Velocity, from Andy Taylor |
| 1997.12.30.09 | Calibrating Vacuum Gages, from Bruce Clark |
|
