Number | Name | Date | Kind |
---|---|---|---|
1903220 | Lemert | Mar 1933 | |
2118073 | Dittmeyer | May 1938 | |
3563277 | Klipper | Feb 1971 | |
3800486 | Harvey | Apr 1974 | |
3856050 | Rooney | Dec 1974 | |
3942681 | Richardson | Mar 1976 | |
4114655 | Bloker | Sep 1978 | |
4146180 | Dettling | Mar 1979 | |
4157100 | Turk | Jun 1979 | |
4158407 | Rest | Jun 1979 | |
4168726 | Klennert | Sep 1979 | |
4295680 | Grasso | Oct 1981 | |
4423753 | Smith et al. | Jan 1984 | |
4799716 | Kujawa et al. | Jan 1989 | |
4869293 | Botsolas | Sep 1989 | |
5265752 | Olson | Nov 1993 | |
5337792 | Tempel | Aug 1994 |
Number | Date | Country |
---|---|---|
757447 | Sep 1956 | GBX |
2037961 | Jul 1980 | GBX |
Entry |
---|
Woodruff Corp., "The Performance Leaders in Plastic Fabrication", Richmond, Ind., no date, but known to applicant before the filing date of this application. |
ICC Primex Plastics Corp., "COR X.TM. Polypropylene Board Product Guide", Richmond, Ind., no date, but known to applicant before the filing date of this application. |