David N. Ferrence — 3 Patents at Utdc

David N. Ferrence has been granted 3 US patents while listed as an inventor at Utdc. The first was granted in 1991 and the most recent in July 1992. David N. Ferrence ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list David N. Ferrence in Kingston, ON, CA.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
5131713	Vehicle for a freight transportation system	—	1992-07-21
5078566	Freight discharge apparatus	—	1992-01-07
5015141	Freight transportation system	—	1991-05-14

David N. Ferrence — 3 Patents

Issued Patents All Time

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