Number | Name | Date | Kind |
---|---|---|---|
3683638 | Devon | Aug 1972 | |
3776694 | Leittl | Dec 1973 | |
3914648 | Friedman et al. | Oct 1975 | |
4383202 | Beck et al. | May 1983 | |
4698206 | Nevin | Oct 1987 |
Entry |
---|
Lab Safety Supply Catalog, p. 142. |
Global Occupational Safety Catalog, p. 28 Prior to 1990. |