| Digest Nr | Subject and Author |
|---|
 |
| 2016.12.02.03 | Polyethylene Sponge Gaskets for Ampico Valves, from Spencer Chase |
| 2015.02.24.03 | Sponge Neoprene for Valve Seats, from Ralph Nielsen |
| 2015.02.22.05 | Sponge Neoprene for Valves, from D. L. Bullock |
| 2015.02.20.04 | Sponge Neoprene for Valves, from John A. Tuttle |
| 2015.02.19.09 | Sponge Neoprene for Valve Seats, from D. L. Bullock |
| 2012.10.26.02 | Sponge Rubber Valve Cores Survive 20 Years, from Bob Taylor |
| 2012.10.23.03 | Sponge Rubber Valve Cores, from Bruce Grimes |
| 2012.10.21.06 | Sponge Rubber Valve Cores Survive 20 Years, from Bob Taylor |
| 2011.03.02.02 | Source of Sponge Rubber for Valve Facing Material, from John Meadows |
| 2011.03.01.05 | Sponge Neoprene, from Robert Loeffler |
| 2011.03.01.04 | Source of Sponge Rubber for Valve Facing Material, from Spencer Chase |
| 2011.02.28.02 | Sponge Neoprene is Original Valve Facing Material, from Bill Maguire |
| 2005.10.19.10 | DuPont "Tyvek" & Sponge Neoprene SC-43, from Bob Taylor |
| 2000.07.05.09 | Sponge Silicone Unit Valves from PPCo, from John A. Tuttle |
| 2000.07.04.08 | Sponge Neoprene Valves, from Bob Taylor |
| 2000.07.03.03 | Sponge Neoprene Unit Valves from PPCo, from Brian Thornton |
| 2000.07.01.04 | Sponge Neoprene Unit Valves from PPCo, from Andy Taylor |
| 2000.01.23.10 | Sponge Neoprene in Reproducing Piano Valves, from D. L. Bullock |
| 2000.01.23.09 | Sponge Neoprene Not in Dynavoice Valves, from D. L. Bullock |
| 2000.01.22.16 | Sponge Neoprene in Reproducing Piano Valves, from Craig Brougher |
| 2000.01.22.15 | Sponge Neoprene in Dynavoice Valves, from Tom Lear |
| 2000.01.21.15 | Valves with Sponge Neoprene, from Bob Taylor |
|
