DS

Dean M. Spear

ET Ethyl: 6 patents #91 of 494Top 20%
Overall (All Time): #895,257 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4644623 Method of making a rotatable molding element for selectively aperturing thermoplastic film Garland E. Raley 1987-02-24
4636161 Screen for selectively perforating thermoplastic film Garland E. Raley 1987-01-13
4604156 Method of fabricating a cylindrical multilayer screen Garland E. Raley 1986-08-05
4585156 Screen fabrication Garland E. Raley 1986-04-29
4543299 Laminated, seamless, cylindrical metal screen for vacuum perforation of thermoplastic film Garland E. Raley 1985-09-24
4541794 Apparatus for producing perforated plastic film Garland E. Raley 1985-09-17