| Number | Name | Date | Kind |
|---|---|---|---|
| 338790 | Slack | Mar 1886 | |
| 720640 | Torrens | Feb 1903 | |
| 1241941 | Dowd | Oct 1917 | |
| 1731340 | Lambert | Oct 1929 | |
| 2497749 | Wagner | Feb 1950 | |
| 2700161 | Boyce | Jan 1955 | |
| 2741410 | LaViolette | Apr 1956 | |
| 2782912 | Humphrey | Feb 1957 | |
| 2972748 | Haynes | Feb 1961 | |
| 3074399 | Bitting | Jan 1963 | |
| 3276670 | Harvey | Oct 1966 | |
| 3372799 | Abildgaard | Mar 1968 | |
| 3543999 | Kugler | Dec 1970 | |
| 3588916 | Glatt | Jun 1971 | |
| 3676887 | Klein | Jul 1972 | |
| 3813121 | Marvin | May 1974 | |
| 3850467 | Johnson | Nov 1974 | |
| 3866245 | Sutherland | Feb 1975 | |
| 3885249 | Brabander | May 1975 | |
| 4132442 | Larsson | Jan 1979 | |
| 4215886 | Naderi et al. | Aug 1980 | |
| 4355424 | McCoy, Jr. | Oct 1982 | |
| 4445230 | Spadaro | Apr 1984 |
| Number | Date | Country |
|---|---|---|
| 1018117 | Oct 1976 | CAX |
| 856133 | Jun 1939 | FRX |
| 1017712 | Jan 1966 | GBX |
| 2100581 | Jan 1983 | GBX |
| Entry |
|---|
| European Search Report of May 29, 1985 in European Patent Application 84,115,656.9 (5 pages). |