Number | Name | Date | Kind |
---|---|---|---|
1540559 | Murphy | Jun 1925 | |
1573707 | Hoerle | Feb 1926 | |
1787415 | Washington | Dec 1930 | |
2472930 | Wilkes | Jun 1949 | |
3473806 | Patterson | Oct 1969 | |
3479030 | Merola | Nov 1969 | |
3507495 | Tucker | Apr 1970 | |
3530048 | Darrow | Sep 1970 | |
3685135 | Letters | Aug 1972 | |
3702702 | Hoult | Nov 1972 | |
3854316 | Wilson | Dec 1974 |
Number | Date | Country |
---|---|---|
518,699 | Mar 1940 | UK |
Entry |
---|
Chemical Engineers' Handbook, 1941, p. 2138. |