Sub-series 2. Foreign Patents, 1909-1946, undated

Arranged alphabetically by subject, this sub-series contains Ernst Berl’s foreign patent files. These files concern individual patents awarded to Ernst Berl by a number of countries outside of the United States, including, but not limited to the United Kingdom, Canada, France, and Germany. The files in this sub-series provide primary documentation of the legal processes of a number of countries through which Ernst Berl’s inventions were patented outside of the United States. They also contain technical information for the inventions represented in this series.

From the Foreign Patents files, one can learn much about the research and development work carried out by Berl to bring the represented inventions into being. They also document the involvement of Ernst Berl’s younger son and patent attorney Herbert Berl in getting some of his father’s inventions patented.

The contents of the Foreign Patents files consist mainly of copies of patents, legal documents, and correspondence. Letters patents, drawing reproductions, clippings, notes, and a few publications are preserved in these files as well.