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All Patents in class 33/379 | |||||
Number | Date | Patentee | Title | Type | |
692,097 | Jan. 28, 1902 | J.R. Wood | Cat's Eye Level | levels | |
721,694 | Mar. 03, 1903 | H.V. Green | Combination Level and Plumb | levels | |
765,321 | Jul. 19, 1904 | W. Potter | Level and Plumb | plumbs | |
1,159,522 | Nov. 09, 1915 | F.B. Miller | Level | metallic levels | |
4,463,501 | Aug. 07, 1984 | G.T. Macklin, R.J. Wright | Level Construction and Methods of Constructing a Level | levels | |
4,559,714 | Dec. 24, 1985 | R.J. Wright | Pitch Measuring Apparatus | levels |