| Number | Name | Date | Kind |
|---|---|---|---|
| 1454888 | Green | May 1923 | |
| 2125313 | Ringler | Aug 1938 | |
| 2672273 | Smith | Mar 1954 | |
| 3314592 | Streich | Apr 1967 | |
| 4044762 | Jacobs | Aug 1977 | |
| 4046251 | Bruml | Sep 1977 | |
| 4232816 | Johnson et al. | Nov 1980 | |
| 4308986 | Parrilli | Jan 1982 | |
| 4383607 | Lordahl et al. | May 1983 | |
| 4666037 | Weissman | May 1987 | |
| 4697700 | Weissman | Oct 1987 |
| Number | Date | Country |
|---|---|---|
| 1124150 | Jun 1956 | FRX |
| Entry |
|---|
| Packaging, vol. 31, No. 9, p. 53, 8/1986, Alloyd Co. advertisement. |
| Flex Guard Packaged Mouthguard, 1989. |