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Adjustable wrench
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Patent number 8,006,591
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Issue date Aug 30, 2011
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Chen Jun Fan
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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2801560
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Patent number 2,801,560
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Issue date Aug 6, 1957
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H01 - BASIC ELECTRIC ELEMENTS
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2800867
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Patent number 2,800,867
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Issue date Jul 30, 1957
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2712766
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Patent number 2,712,766
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Issue date Jul 12, 1955
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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2711576
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Patent number 2,711,576
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Issue date Jun 28, 1955
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2709077
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Patent number 2,709,077
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Issue date May 24, 1955
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C21 - METALLURGY OF IRON
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2680000
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Patent number 2,680,000
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Issue date Jun 1, 1954
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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2674966
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Patent number 2,674,966
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Issue date Apr 13, 1954
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2668183
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Patent number 2,668,183
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Issue date Feb 2, 1954
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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2654567
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Patent number 2,654,567
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Issue date Oct 6, 1953
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E21 - EARTH DRILLING MINING
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2632417
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Patent number 2,632,417
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Issue date Mar 24, 1953
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2616320
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Patent number 2,616,320
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Issue date Nov 4, 1952
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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2612066
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Patent number 2,612,066
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Issue date Sep 30, 1952
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E21 - EARTH DRILLING MINING
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2604804
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Patent number 2,604,804
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Issue date Jul 29, 1952
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2591763
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Patent number 2,591,763
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Issue date Apr 8, 1952
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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2591887
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Patent number 2,591,887
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Issue date Apr 8, 1952
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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2581833
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Patent number 2,581,833
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Issue date Jan 8, 1952
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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2562307
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Patent number 2,562,307
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Issue date Jul 31, 1951
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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2557202
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Patent number 2,557,202
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Issue date Jun 19, 1951
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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2449748
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Patent number 2,449,748
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Issue date Sep 21, 1948
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2422114
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Patent number 2,422,114
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Issue date Jun 10, 1947
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2356864
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Patent number 2,356,864
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Issue date Aug 29, 1944
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H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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2215122
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Patent number 2,215,122
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Issue date Sep 17, 1940
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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2182663
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Patent number 2,182,663
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Issue date Dec 5, 1939
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2167887
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Patent number 2,167,887
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Issue date Aug 1, 1939
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2088148
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Patent number 2,088,148
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Issue date Jul 27, 1937
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E21 - EARTH DRILLING MINING
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2005161
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Patent number 2,005,161
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Issue date Jun 18, 1935
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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1989068
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Patent number 1,989,068
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Issue date Jan 22, 1935
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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1983050
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Patent number 1,983,050
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Issue date Dec 4, 1934
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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1969572
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Patent number 1,969,572
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Issue date Aug 7, 1934
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR