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Filter: Subject of inventions
| Date: | 03 14 1949 |
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| Description: | Mrs. Edith Trowbridge, 4202 Mandan Cresent, pulls a ring on a string which opens a trap door to a metal-lined slide to a basement trash box under her sink ... |
| Date: | 03 15 1945 |
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| Description: | Hulda Gieschen and Dr. Warren E. Gilson, who specializes in electro-physiology and medical electronics at the University of Wisconsin, are looking at a Gil... |
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