Patents Assigned to Dorothy A. Smith
  • Volumetric air sampler for collecting multiple discrete samples
    Patent number: 5201231
    Abstract: A mechanical air sample collector used to detect the presence of airborne impurities in ambient air. The apparatus collects volumetric samples of air in multiple discrete samples periodically, over set periods of time, without excessive supervision by an operator.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: April 13, 1993
    Assignee: Dorothy A. Smith
    Inventor: Edgar G. Smith