https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85475&pn=1,742,140 Can opener Patentees: Edward L. Girard - Washingtonville OH , Fred F. Girard - Washingtonville OH Granted:1929-12-31

The patented features include the wall bracket, and the structure of the cutter and the "flanged toothed wheel" portion of the cranked mechanism. The OPN-EZY can opener was announced to the hardware trade in fall 1929.
This is one of 84,767 patents currently in the database at datamp.org

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