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John M. Spangler

Caterpillar: 2 patents #92 of 826Top 15%
Overall (2021): #145,726 of 548,734Top 30%
2
Patents 2021

Issued Patents 2021

Patent #TitleCo-InventorsDate
11149857 Appliance for making isotropically finished seal ring of seal assembly for machine Bao Feng, Connor J. Haas, Joseph J. Every, Daniel P. Vertenten 2021-10-19
10927959 Method and appliance for making isotropically finished seal ring of seal assembly for machine Bao Feng, Connor J. Haas, Joseph J. Every, Daniel P. Vertenten 2021-02-23