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Zens; Roger A.
Zell, SD
No. of patents:

Patent Number Title Of Patent Date Issued
5372094 Bird feeder December 13, 1994
A bird feeder is made from a paperboard container, such as those commonly employed to contain milk. In a first embodiment, two slots are cut in the container above the floor in opposing vertical walls, and two holes are formed near the floor, one hole located below each slot. Feed trough

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