| Patents Granted on 1831-07-20 |
Patents 1 -
15
of 45
      |
| Number | Date | Patentee | Title | Type |
| 6,612X | Jul. 20, 1831 | W.T. Boyd, M. Allen | Excavator and self loading cart | excavators |
| 6,613X | Jul. 20, 1831 | A. Bassford | Cushions for Billiard Tables | desks and tables |
| 6,614X | Jul. 20, 1831 | E. Bates, D. Updegraff | Cooking Stove | stoves |
| 6,615X | Jul. 20, 1831 | J. Butterworth | Iron Hoops to Be Applied to the Bottoms of Card and Drawing Cans | metal bending machines |
| 6,616X | Jul. 20, 1831 | A. Church | Soda Water Apparatus | soda fountains and soda apparatus |
| 6,617X | Jul. 20, 1831 | N.H. Coleman | Soda Fountain | |
| 6,618X | Jul. 20, 1831 | E.M. Converse | Machinery for Manufacturing Tin Ware | sheet metal |
| 6,619X | Jul. 20, 1831 | I. Crawford | Thrashing machine | threshers and thrashers |
| 6,620X | Jul. 20, 1831 | A.D. Cushing | Percussion lock and walking cane, rifle, and pistol | gunsmith |
| 6,621X | Jul. 20, 1831 | J.W. Dart, W. Webster | Grist mill | grist mills |
| 6,622X | Jul. 20, 1831 | G. Domett | Cutting leather at one operation | leatherworker |
| 6,623X | Jul. 20, 1831 | J.C. Douglas | Safety Steam Boiler | stationary boilers |
| 6,624X | Jul. 20, 1831 | A.D. Richmond, T.G. Dyre | Moulds for making candles | chandler |
| 6,625X | Jul. 20, 1831 | W. Lockwood, E.C. Everts | Boring and drilling stone | stonemason |
| 6,626X | Jul. 20, 1831 | P. Harrington | Thrashing machine | threshers and thrashers |
