DURYEA LABORATORIES CHAS. E. DURYEA, CONSULTING
ENG'R
WE SOLV MECHANICAL AND OTHER PROBLEMS TESTS, SEARCHES, OPINIONS,
EXPERT IN PATENT SUITS.
DEVELOP INVENTIONS, ASSIST INVENTORS 35 YRS EXPERIENS. HEATING,
GAS ENGIN, AUTO, ETC.
FOR THINGS TO MAKE OR SEL CONSULT US A PRIDEWORTHY RECORD OF
THINGS ACCOMPLISHT
PHILADELPHIA, PA.
3528 N. 18TH ST.