|
| US3941130 | 18 Mar 1975 | 2 Mar 1976 | | Sequential trigger release for injection device |
| US4196730 | 1 Aug 1977 | 8 Apr 1980 | | Liquid drug dispenser |
| US4228922 | 23 Oct 1978 | 21 Oct 1980 | | Apparatus for injecting a desired volume of liquid in liquid and gas-liquid chromatography |
| US4261358 | 1 Oct 1979 | 14 Apr 1981 | | Automatic syringe plunger |
| US4333459 | 4 Mar 1981 | 8 Jun 1982 | | Intramuscular injection device suitable for insulin injections |
| US4351332 | 27 Mar 1981 | 28 Sep 1982 | | Split nut for injector |
| US4547189 | 5 Mar 1984 | 15 Oct 1985 | John A. Long | Insulin syringe injector apparatus with auto-aspirator feature |
| US5141496 | 27 Jan 1992 | 25 Aug 1992 | | Spring impelled syringe guide with skin penetration depth adjustment |
| USRE32922 | 2 Apr 1987 | 16 May 1989 | Paul D. Levin | Blood sampling instrument |
