Methods of monitoring the presence or movements of humans

Details Methods of monitoring the presence or movements of humans Methods of monitoring the presence or movements of humans

1969-06-18

1980-04-01

Pendegrass, Verlin R.

Measuring and testing

Gas analysis

Gas chromatography

324459, G01N 3708

Patent

active

041955137

ABSTRACT:
Methods in which humans or other mobile bodies are exposed to volatile tracking and marking substances, the vapors of which are detected by ionizing gaseous samples, analyzing the ions in a drift field, and detecting at least a portion of the ions.

REFERENCES:
patent: 3211996 (1965-10-01), Fox et al.
patent: 3358140 (1967-12-01), Curran et al.
patent: 3430482 (1969-03-01), Draunieks et al.

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