Number | Name | Date | Kind |
---|---|---|---|
1623209 | Schuster | Apr 1927 | |
2324533 | Pearson et al. | Jul 1943 | |
2767300 | Verter | Oct 1956 | |
3143167 | Vieth | Aug 1964 | |
3155157 | Anderson et al. | Nov 1964 | |
3790749 | Lee | Feb 1974 | |
4196772 | Adamski et al. | Apr 1980 | |
4231425 | Engstrom | Nov 1980 | |
4261415 | Smith, Jr. | Apr 1981 | |
4269265 | Meyer et al. | May 1981 | |
4379390 | Bottum | Apr 1983 | |
4446360 | Gellert | May 1984 |
Entry |
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Catalog Sheets; Parr Instrument Company, Moline, Illinois, Catalog 4500, 3/82, pp. 1-2, 42-43. |
Catalog Sheets; (PPI) Pressure Products Industries Division; The Duriron Company Inc., Warminster, PA, 7/79, p. 4. |
Catalog Sheets; Superpressure Equipment, Nov. 1981, p. 28. |
Catalog Sheets; High Pressure Equipment Co., Erie, PA, Catalog 90A, pp. 40-41. |