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Patents Granted on 1991-12-31 | |||||
Number | Date | Patentee | Title | Type | |
5,076,448 | Dec. 31, 1991 | J.G. Ballard | Portable hydraulic crane | engine and transmission hoists | |
5,076,742 | Dec. 31, 1991 | L.G. Lee, F.A. McLean, G.W. Lacoste, T.C. Frank, L. Sevack, D.D. Bradette | Hinge drilling jig |