|
| US4062964 | 4 Oct 1976 | 13 Dic 1977 | Ciba-Geigy Corporation | Antifertility-combinations |
| US4156604 | 15 Sep 1978 | 29 May 1979 | Minnesota Mining and Manufacturing Company | Controlled delivery of corrosion inhibitors for silver recovery cartridges |
| US4186742 | 9 Jun 1978 | 5 Feb 1980 | Donald Enterprises, Inc. | Contraceptive-antivenereal disease tampon |
| US4309997 | 24 Mar 1980 | 12 Ene 1982 | | Contraceptive and/or antivenereal disease tampon |
| US5672359 | 20 Nov 1995 | 30 Sep 1997 | The University of Kentucky Research Foundation | Multicompartment hard capsule with control release properties |