Patents Assigned to Polmonary Data Service Instrumentation, Inc.
  • Disposable bacteria filter
    Patent number: 5337739
    Abstract: An interchangeable set of wide orifice respiratory filter elements can be built into either a low resistance, high dead space embodiment for forced vital capacity testing or high resistance, low dead space embodiment for diffusion and residual air tests. A disposable 3M Filtrete.TM. pad is at the heart of all embodiments thus allowing extremely high levels of filtration efficiencies.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: August 16, 1994
    Assignee: Polmonary Data Service Instrumentation, Inc.
    Inventor: Arlin D. Lehman