3853477 is referenced by 12 patents and cites 2 patents.

Human breath tester for quantitatively measuring alcoholic content as an indication of the state of intoxication, if any, of any person, typically an automobile driver. The unit is fully transistorized and is programmed to sequence through a purge and blank cycle prior to an actual test to assure a reliable reading. A digital display and printer provide duplicate output readings and a novel sample chamber construction insures accurately metered samples of deep lung breath.

Title
Breath analyzer
Application Number
05/318,788
Publication Number
3853477
Application Date
December 27, 1972
Publication Date
December 10, 1974
Inventor
Spampanato Gavino A
De Wilde Robert N
Block Lawrence Allan
Agent
Walsh Patrick J
Assignee
Bangor Punta Operations
IPC
G01n 33/18
G01n 21/24
G01N 33/483
G01N 33/497
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