|
| US4383451 | 10 Abr 1981 | 17 May 1983 | | Apparatus and method for removing material |
| US5044568 | 20 Ago 1990 | 3 Sep 1991 | Takachiho Kogyo Yuugen Kaisha | Hand crusher with rotatably mounted handle |
| US5245878 | 12 Jul 1991 | 21 Sep 1993 | | Vegetation maintenance system |
| US5328221 | 30 Jun 1992 | 12 Jul 1994 | G. R. Osterland Company | Core puller for pulling test cores |
| US5431466 | 16 Ago 1994 | 11 Jul 1995 | G. R. Osterland Company | Apparatus for pulling cores |
| US6098725 | 17 Ago 1998 | 8 Ago 2000 | SoilCore, Inc. | Soil sampling device with frangible section and method of sampling |
| US6125948 | 6 Nov 1998 | 3 Oct 2000 | Soil Core, Inc. | Soil sampling device with frangible section |
| US6176326 | 6 Oct 1998 | 23 Ene 2001 | SoilCore, Inc. | Soil sampling measuring device |
