PATENT OF FILTERING APPARATUS (1936)
Text on the reverse side:This invention enables the support of a funnel to in conjunction with one or several receptacles, such as test tubes or the like, in order that a single funnel can serve liquid to a plurality of receptacles or test tubes without the necessity of shifting the funnel supporting device.
Variants (1)
- Default Title — 3.50 GBP — In stock
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