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Filter: Subject of Inventions
| Date: | 10 08 1953 |
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| Description: | Display of Research Products Corporation Filter Fry frying pan covers in a grocery cart. |
| Date: | 01 11 1954 |
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| Description: | A man displaying a Research Products Corporation rack for Filter Fry frying pan covers, "Takes the spatter out of kitchen frying." |
| Date: | 04 12 1954 |
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| Description: | Workman riveting two filter frames together horizontally. Taken for Research Products, 1011-1015 East Washington Avenue. |
| Date: | 04 12 1954 |
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| Description: | Workman riveting filter frames together in a L shape, taken for Research Products, 1011-1015 East Washington Avenue. |
| Date: | 1863 |
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| Description: | A sketch of mechanical parts for an invention. |
| Date: | 1863 |
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| Description: | A sketch of a thermometer. Quoting from Muir's autobiography "My Boyhood and Youth" he described the thermometer as "made of an iron rod, about three feet ... |
| Date: | 1863 |
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| Description: | Watercolor illustration of a barometer designed by John Muir in his boyhood. |
| Date: | 1863 |
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| Description: | A watercolor illustration of a combined thermometer, hygrometer, barometer, and pyrometer. |
| Date: | 1863 |
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| Description: | Muir's illustration of a means to record time by use of a star. He titled the drawing "The star hand rising and setting with the sun all the year". |
| Date: | 1863 |
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| Description: | A John Muir sketch of a fancake draught of sawframe with crankshaft in position. Scale two inches per foot. Depth of frame 5 1/2 inches. Speed of cranks... |
| Date: | |
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| Description: | A woman demonstrates the use of a homemade bee catcher on a tree in her yard. |
| Date: | 1916 |
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| Description: | Postcard including a photograph of a device used to transport a queen bee. On it is also an advertisement for ordering queen bees. |
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