David A. Esala

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Alexandria, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Horizontal staging hopper
- Patent number 5,211,529
- Issue date May 18, 1993
- R. A. Pearson Company
- David A. Esala
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL