3322536 | Tungsten slip casting method | 1967-05-30 | ||
3287112 | Production of filter membranes | 1966-11-22 | ||
3180012 | Cobalt alloys | 1965-04-27 | ||
2849312 | Method of aligning magnetic particles in a non-magnetic matrix | 1958-08-26 | ||
2825670 | Permanent magnet and process for making same | 1958-03-04 | ||
2661387 | Porous electrode plates and process for making such articles | 1953-12-01 | ||
2384215 | Powder metallurgy | 1945-09-04 | ||
1893330 | Permeable metal and method of making the same | 1933-01-03 |
GB590392A | 1947-07-16 |