Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5908521 | Method of manufacturing multilayer plasterboard | John Ainsley, John James Bradshaw | 1999-06-01 |
| 5714032 | Method of manufacturing multilayer plasterboard and apparatus therefor | John Ainsley, John James Bradshaw | 1998-02-03 |
| 5580002 | Method and apparatus for heating and grinding materials | David J. Ball, Philip Curtis, Edward Varney | 1996-12-03 |
| 4629419 | Calcination method and apparatus | Christopher Todd-Davies | 1986-12-16 |
| 4225360 | Treatment of gypsum plaster | — | 1980-09-30 |