Some of this material is covered in a book titled American Style:  Classic Product Design from Airstream to Zippo by Richard Sexton, 1987.

KEY ELEMENTS AND ATTRIBUTES OF AMERICAN PRODUCT DESIGN:   

   
 
    GENEROUS USE OF RAW MATERIALS WITH A CAREFREE QUALITY UNCONCERNED OF THE MATERIALS UTILIZED

    SIMPLE, LOGICAL DESIGN   

    FUNCTIONAL, SOLIDLY BUILT, DEPENDABLE AND DURABLE

    RADICAL REDESIGN RATHER THAN INCREMENTAL IMPROVEMENTS

    FORM FOLLOWS FUNCTION-

            AMERICAN SHAKER STYLE FURNITURE AND CONSTRUCTION/DECORATION
            LOUIS SULLIVAN

American design affirms the power of human beings to create, improve, and reshape their environment, with the aid of scientific knowledge, technology and practical experimentation, and is thus is optimistic in its essence.  Some concepts of USA design include: (1) the sense of forward-looking contemporaneity, (2)  the belief in the power and potential of the machine and industrial technology
and (3) the emphasis on process.

    The following page has two sections.

1.  Product examples that do not generally feature outside influences and are pure American looking products.

2.  Below the first section are the original trailblazers of American Product design.  Many blended various outside influences and schools of design with the attributes listed above to create iconic products. 

Nothing States a product is Made In America as much as a Product which "Looks American", with true USA Archetypes and minimal design school influences .  This list with visuals offers some examples.