| Patents for George Spencer |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
 | 1,837 | Oct. 28, 1840 | W.M. Fowler | Machine for planing and forming ivory for combs |
| | 764,015 | Jul. 05, 1904 | G. Spencer | Pressure Gage |
| | 764,016 | Jul. 05, 1904 | G. Spencer | Pressure Gage |
| | 794,054 | Jul. 04, 1905 | G. Spencer | Pressure Gage |
| | 829,551 | Aug. 28, 1906 | G. Spencer | Pressure Gage |
| | 829,552 | Aug. 28, 1906 | G. Spencer | Pressure Gage |
| | 829,553 | Aug. 28, 1906 | G. Spencer | Pressure Gage |
| | 897,311 | Sep. 01, 1908 | G. Spencer | Pressure Recorder |
| | 898,148 | Sep. 08, 1908 | G. Spencer | Pressure Gage |
