Method and means for the calibration of particle counting apparatus
United States Patent 3412037
Inventors:
Nathan, Gochman
Negersmith, Kent M.
Publication Date:
11/19/1968
Other Classes:
436/18, 356/39, 436/17, 435/808, 435/29, 73/1.030
International Classes:
C12Q1/02; G01N15/10; G01N33/483; G01N33/96