Inventor · disambiguated record
Dean M. Spear
Also filed as: SPEAR DEAN M
6 granted patents·125 citations·filing 1983–1985
85Inventor score
Files withETHYL CORP6
Top patents by PatentIndex Score
6 records- 0173US4636161AScreen for selectively perforating thermoplastic filmETHYL CORP·Filed 1985·Granted Jan 13, 1987·29 cites·8 claims
- 0272US4644623AMethod of making a rotatable molding element for selectively aperturing thermoplastic filmETHYL CORP·Filed 1985·Granted Feb 24, 1987·28 cites·8 claims
- 0365US4604156AMethod of fabricating a cylindrical multilayer screenETHYL CORP·Filed 1985·Granted Aug 5, 1986·22 cites·10 claims
- 0464US4543299ALaminated, seamless, cylindrical metal screen for vacuum perforation of thermoplastic filmETHYL CORP·Filed 1983·Granted Sep 24, 1985·19 cites·12 claims
- 0563US4541794AApparatus for producing perforated plastic filmETHYL CORP·Filed 1983·Granted Sep 17, 1985·18 cites·4 claims
- 0642US4585156AScreen fabricationETHYL CORP·Filed 1985·Granted Apr 29, 1986·9 cites·20 claims
Join the waitlist — get patent alerts
Get an alert when Dean M. Spear files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →