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| Number | Title | Issue Date |
| 4202212 | In-line respirating pump Device for sampling air in proportion to respiration, particularly the collection of air pollutants in proportion to the actual respiration of the wearer. The device includes a pump supported adjacent the thoracic cavity and activated by the expansion and... | 05/13/1980 |
| 4187836 | Floating piston respirating pump Device for sampling air in proportion to respiration, particularly the collection of air pollutants in proportion to the actual respiration of the wearer. The pump is supported adjacent the thoracic cavity by means of a harness and is activated by the exp... | 02/12/1980 |
| 4187859 | Respirating pump Method for sampling air in proportion to respiration, particularly the collection of air pollutants in proportion to the actual respiration of the wearer. The method is characterized by its use of a pump supported adjacent the thoracic cavity and activate... | 02/12/1980 |
| 4183247 | Method for sampling air in proportion to respiration Method for sampling air in proportion to respiration, particularly the collection of air pollutants in proportion to the actual respiration of the wearer. The method is characterized by its use of a pump supported adjacent the thoracic cavity and activate... | 01/15/1980 |
