| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents Granted on 1800-02-12 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 273X | Feb. 12, 1800 | J.J. Hawkins | Improvement in piano fortes | music instrument maker | |
| 274X | Feb. 12, 1800 | H. Killey, II | Method of Covering Salt Vats from the Weather | salt making apparatus | |
| 275X | Feb. 12, 1800 | P. Lyon | Engine for throwing water | steam pumps | |
| 276X | Feb. 12, 1800 | N. Ladd | Extracting Essence of Sumack, Fera, etc for Tanning | leatherworker | |