Spear; Dean M.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Spear; Dean M..The latest application filed is for "method of making a rotatable molding element for selectively aperturing thermoplastic film".
- Spear; Dean M. - Terre Haute IN
| Patent | Date |
|---|---|
| Method of making a rotatable molding element for selectively aperturing thermoplastic film Grant 4,644,623 - Raley , et al. February 24, 1 | 1987-02-24 |
| Screen for selectively perforating thermoplastic film Grant 4,636,161 - Raley , et al. January 13, 1 | 1987-01-13 |
| Method of fabricating a cylindrical multilayer screen Grant 4,604,156 - Raley , et al. August 5, 1 | 1986-08-05 |
| Screen fabrication Grant 4,585,156 - Raley , et al. April 29, 1 | 1986-04-29 |
| Laminated, seamless, cylindrical metal screen for vacuum perforation of thermoplastic film Grant 4,543,299 - Raley , et al. September 24, 1 | 1985-09-24 |
| Apparatus for producing perforated plastic film Grant 4,541,794 - Raley , et al. September 17, 1 | 1985-09-17 |
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