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- Cases1
- Haines, James, b. 18221
- Haines, Jonathan, d. 18681
- Harvesting machinery7
- History2
- McCormick, Cyrus Hall, 1809-18844
- Morgan, Dayton S.3
- Patent extensions1
- Patent laws and legislation1
- Patent suits3
- Patents5
- Seymour, William H., 19th cent1
- Seymour, William H., active 19th century2
- Trials, litigation, etc2