Number | Date | Country | Kind |
---|---|---|---|
1996-15705 | May 1996 | KRX |
Number | Name | Date | Kind |
---|---|---|---|
1379247 | Carpenter | May 1921 | |
1639491 | Daniel | Aug 1927 | |
2193495 | Rolkern | Mar 1940 | |
2444603 | Harvey | Jul 1948 | |
2691884 | Walker | Oct 1954 | |
2734368 | Richardson | Feb 1956 | |
3017758 | Haverstock et al. | Jan 1962 | |
3066522 | Steinmuller | Dec 1962 | |
4971449 | Hendren | Nov 1990 |
Number | Date | Country |
---|---|---|
596300 | Mar 1978 | SUX |
Entry |
---|
European Patent Office (EPO) 352,439 68/3R Jan. 1990. |