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| All Patents in class 33/507 | |||||
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| Number | Date | Patentee | Title | Type | |
| 595,865 | Dec. 21, 1897 | W.H. Reisner | Lens Measure | dial indicator gauges | |
| 703,725 | Jul. 01, 1902 | F. Hardinge | Diopter gage | optician | |
| 900,531 | Oct. 06, 1908 | F. Hardinge | Lens measuring instrument | ||
| 1,151,635 | Aug. 31, 1915 | A.T. Webb | Diopter gage | optician | |
| 2,808,651 | Oct. 08, 1957 | C.W. Johnson | Caliper for a Lens or the Like | calipers | |