Number | Name | Date | Kind |
---|---|---|---|
3763697 | Sturm | Oct 1973 | A |
3969928 | Zarka | Jul 1976 | A |
4701224 | Zado | Oct 1987 | A |
4896339 | Fukumoto | Jan 1990 | A |
5146779 | Sugimoto et al. | Sep 1992 | A |
5382757 | Ishida | Jan 1995 | A |
5463896 | Abbate et al. | Nov 1995 | A |
5999887 | Giannakopoulos et al. | Dec 1999 | A |
6076411 | Horvath | Jun 2000 | A |
6134954 | Suresh et al. | Oct 2000 | A |
6155104 | Suresh et al. | Dec 2000 | A |
6311135 | Suresh et al. | Oct 2001 | B1 |
Entry |
---|
“SwissRock 180 Universal Rockwell Hardness Tester”, http://www.qualitest-inc.com/swissrock180.htm. |