| Patents for William B. Fell |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 2,211,201 | Aug. 13, 1940 | W.B. Fell | Machinist's precision level | spirit levels |
| 2,316,777 | Apr. 20, 1943 | W.B. Fell | Machinist's precision level | spirit levels |
| 2,940,784 | Jun. 14, 1960 | W.B. Fell | Precision threaded adjustment | machinist levels |
| 3,030,710 | Apr. 24, 1962 | W.B. Fell | Micro-precision levels | spirit levels |
| 3,034,220 | May 15, 1962 | W.B. Fell | Micro-precision level | machinist levels |
| 3,226,832 | Jan. 04, 1966 | W.B. Fell | Linearity testing gauge | measuring tools |
| CA-761,164 | Jun. 20, 1967 | W.B. Fell | Linearity testing gauge | measuring tools |
| 3,605,508 | Sep. 20, 1971 | W.B. Fell | Precision threaded adjustment | machinist levels |
