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| All Patents in class 356/140 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 4,281,928 | Aug. 04, 1981 | A.N. Brunson | Optical Transit Square with Focusable Crossing Telescopes | ||
| 4,752,126 | Jun. 21, 1988 | K. Fujii | Surveying Instrument | ||