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Fred C. Ielfield patents
Found in:
Manuscripts and Archives
Collection
Accession: 1043
Abstract:
Fred C. Ielfield (1864-1948) was a mechanical engineer and inventor. This collection consists of twelve patents for mail canceling and postmarking machinery, corn-husking machinery, and a cereal cutter, all invented by Ielfield.
Dates:
1901-1946