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| Number | Title | Issue Date |
| 4341538 | Intravenous filter A filter for intravenous solutions including a flat, rectangular housing formed of two pieces sandwiching a filter sheet diagonally from end to end with support ribs on one side of the sheet and luer connections in the large end of each piece of the housi... | 07/27/1982 |
| 4244820 | Fluid purification system A fluid purification system for performing filtration of particles from a feed liquid by a tangential flow of the feed liquid over a membrane surface. In one embodiment, the purification system includes a filter cartridge contained within a filter housing... | 01/13/1981 |
| 4206055 | Household water filter The invention provides a water filter, particularly suited for household use, with valving which enables either a bypass mode or a filtering mode. During the filtering mode the water flows through a number of filtering layers one of which is a microporous... | 06/03/1980 |
| 4160700 | Petri dish In accordance with the invention there is provided a petri dish comprising a container for the growth of microorganism cultures and a lid for the container to prevent the entrance of contaminants, each of the container and lid having a radially outwardly ... | 07/10/1979 |
| 4111807 | Mouth filter for use with pipettes In accordance with the invention there is provided a mouth filter for use with pipettes to insure that none of the liquid or any of the bacteria in the liquid being drawn into the pipette reach the mouth of the technician applying the suction. The filter ... | 09/05/1978 |
| 4025438 | Water filter device In accordance with the invention there is provided a water filter and water filter cartridge having an upper water filtering layer containing charcoal particles, a lower filtering layer having a submicron pore size and an intermediate filtering layer havi... | 05/24/1977 |
| 4001120 | Water filter device In accordance with the invention there is provided a water filtering device for attachment to a faucet comprising a generally tubular passage with an inlet for water from the faucet at its upper end and an outlet for water at the lower end, an annular wat... | 01/04/1977 |
