Number | Date | Country | Kind |
---|---|---|---|
2341500 | Aug 1973 | DT |
Number | Name | Date | Kind |
---|---|---|---|
2615945 | Jaeschke | Oct 1952 | |
2783643 | Sihvoner | Mar 1957 | |
2990485 | Lee | Jun 1961 | |
3163792 | Sayers | Dec 1964 | |
3168666 | Grobel | Feb 1965 |
Entry |
---|
"Magnetic Fluids and Applications Sketches," Machine Design, (Ferrofluidics Corp.), 6/14/74. |