Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5908521 | Method of manufacturing multilayer plasterboard | John Ainsley, Arthur G. T. Ward | 1999-06-01 |
| 5714032 | Method of manufacturing multilayer plasterboard and apparatus therefor | John Ainsley, Arthur G. T. Ward | 1998-02-03 |
| 5575844 | Method of preparing gypsum products | — | 1996-11-19 |
| 5484200 | Mixer | — | 1996-01-16 |