Inventors are constantly working, and holidays are no exception.  Holidays seem to be a source of inspiration for many inventors, in fact, and Independence Day is no exception.

What says Independence Day better than the patriotic grill cover in U.S. Patent No. D49032?

Perhaps the centennial medal of U.S. Patent No. D9103:

Or maybe it’s the centennial watch charm from U.S. Patent No. D7164: