Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4698289 | Process for making ferrite spherical particulate toner core from raw fly ash | Robert G. Aldrich, Geoffrey H. Earl | 1987-10-06 |
| 4592988 | Ferrite toner carrier core composition derived from fly ash | Robert G. Aldrich, Geoffrey H. Earl | 1986-06-03 |