Engineering

Martin, Pierre-Émile

French engineer

Freyssinet, Eugène

French engineer

Prestressed Concrete

building material

Crane

materials handling

DuMont, Allen B.

American engineer and inventor

Rotary Engine

Diesel, Rudolf

French-German engineer

Beau De Rochas, Alphonse-Eugène

French engineer

Carpentry

construction

Magneto

instrument

Cooper, Peter

American inventor and manufacturer

Fowler, John

British engineer

Dornberger, Walter Robert

German engineer

Russell, John Scott

British engineer

Burroughs, William Seward

Biography, Adding Machine, & Facts

Lenin

ship