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ES283212A1
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Improvements in the materials employed for photointrepreneurship by diazotipia (Machine-translation by Google Translate, not legally binding)
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US2184352A
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Telescope
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US2184351A
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Surveying instrument
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US2102364A
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Spirit level and means for mounting same
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US2132171A
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Surveying instrument
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US2130095A
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Telescope
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US2065472A
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Pin mounting
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US2064941A
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Pin mounting
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US2132170A
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Transit
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US2126335A
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Telescope
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US2101077A
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Spirit level and mounting
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US2127302A
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Level
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US2209087A
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Production of photographic diazotype prints
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US2113944A
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Production of photographic diazotype prints
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US2053837A
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Stadia instrument
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US1952134A
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Slide rule
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US1772356A
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Process of forming leveling-rod clamps
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US1845296A
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Continuous developing apparatus
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US1820280A
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Developing apparatus
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US1795724A
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Developing apparatus
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