Number | Date | Country | Kind |
---|---|---|---|
9-174903 | Jun 1997 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
955227 | Tunis | Apr 1910 | |
2187188 | Whitcomb | Jan 1940 | |
2892354 | Amonsen | Jun 1959 | |
3788155 | Cigala et al. | Jan 1974 | |
4227423 | Crowe | Oct 1980 | |
4292723 | Rauscher | Oct 1981 | |
4367067 | Chao | Jan 1983 | |
4781660 | Amataka et al. | Nov 1988 | |
4905361 | Morishita et al. | Mar 1990 | |
4947533 | Taniguchi et al. | Aug 1990 | |
5403240 | Smith et al. | Apr 1995 | |
5725446 | Kaku et al. | Mar 1998 |
Number | Date | Country |
---|---|---|
1 520 244 | Aug 1978 | GBX |
1 523 431 | Aug 1978 | GBX |
Entry |
---|
Japanese Industrial Standard; "Surface Roughness--Definitions and Designation"; 1994. |