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Vehicular tunnel ventilation systems
US 2,726,594 A
Filed
: 06/06/1950
Issued
: 12/13/1955
Est. Priority Date
: 06/06/1950
Status: Expired due to Term
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Current Assignee
Benjamin Cooper
,
Stanley A. Kroll
Original Assignee
Benjamin Cooper
,
Stanley A. Kroll
Inventors
Cooper, Benjamin
,
Kroll, Stanley A.
Application Number
US03/166,314
Time in Patent Office
2,016 Days
Field of Search
US Class Current
454/167
CPC Class Codes
E21F 1/003
Ventilation of traffic tunn...
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