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File:Patent-US-750546.pdf |Inventor=Frank M. Kegrize |Assignee=Frank M. Kegrize(1 159 × 1 704 (192 KB)) - 01:24, 14 nov 2013
File:Patent-US-734563.pdf |Inventor=Frank M. Kegrize |Assignee=Frank M. Kegrize(1 159 × 1 704 (146 KB)) - 01:25, 14 nov 2013
File:Patent-US-757664.pdf |Inventor=Frank M. Kegrize |Assignee=Frank M. Kegrize(1 159 × 1 704 (227 KB)) - 02:16, 15 ago 2013
File:Patent-GB-190407468.pdf |Inventor=Frank M. Kegrize |Assignee=Frank M. Kegrize(1 239 × 1 754 (369 KB)) - 01:24, 12 dic 2021
File:Patent-US-810284.pdf |Inventor=Frank M. Kegrize |Assignee=Frank M. Kegrize(1 159 × 1 704 (170 KB)) - 01:07, 13 nov 2013
File:Patent-US-807280.pdf |Inventor=Frank M. Kegrize |Assignee=Frank M. Kegrize(1 159 × 1 704 (123 KB)) - 15:57, 10 ago 2013