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| - All of these designs that have various types of latching devices are Z. M. Roehr et al U.S. Pat. No. 3,008,570, Z. M. Roehr U.S. Pat. No. 3,107,785, Bartner, et al U.S. Pat. No. 3,895,633, G K Burke U.S. Pat. No. 3,306,291, Gyure et al U.S. Pat. No. 4,300,678, Winstead Hall U.S. Pat. No. 6,356,822, Sampson U.S. Pat. No. 4,425,120, Larson U.S. Pat. No. 4,639,249, Harbaugh U.S. Pat. No. 4,655,751, S
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