Kendrick & Davis were granted a number of patents over the years. Four of those patents that pertain specifically to the Inverto products and one general staking tool patent are summarized below. Another relevant patent assigned to Hammel, Riglander covers the design of the No. 540 Jeweling Attachment.
Select a patent from the menu above for a restored copy of each patent, including screen resolution images of each figure.
Select a patent from the menu above for a restored copy of each patent, including screen resolution images of each figure.
US Patent 904847
The original Inverto patent. Filed in Oct. 1907 and granted in Nov. 1908 An html version of the patent generated by OCR of the USPTO scan is available here. (Please let me know if I've missed any OCR typos.) The original USPTO scan is available for download at right. |
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US Patent 1045487
Covers the "friction punch sustaining sleeve". Filed in May 1908 and granted in Nov. 1912 An html version of the patent generated by OCR of the USPTO scan is available here. (Please let me know if I've missed any OCR typos.) The original USPTO scan is available for download at right. |
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US Patent 923495
The patent for the improved punch frictioning mechanism. Filed in Aug. 1908 and granted in June 1909 An html version of the patent generated by OCR of the USPTO scan is available here. (Please let me know if I've missed any OCR typos.) The original USPTO scan is available for download at right. |
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US Patent 1539890
The patent for the floating die plate. Filed in June 1923 and granted in June 1925 An html version of the patent (created by retyping the whole damn thing because the USPTO scan is such poor quality) is available here. (Please let me know if you find any typos. I'm not a great typist.) The original USPTO scan is available for download at right. |
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US Patent 707887
The patent for the spring loaded stake retainer in the staking frame head. Filed May 10, 1902 and granted August 26, 1902. An html version of the patent generated by OCR of the USPTO scan is available here. (Please let me know if I've missed any OCR typos.) The original USPTO scan is available for download at right. |
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US Patent 2116213
The patent the covers the basis for the No. 540/540R/540S Jeweling Attachment. Filed August 3, 1937 and granted May 3, 1938. Assigned to Hammel, Riglander not K&D. The relationship between these two companies is not clear. An html version of the patent generated by OCR of the USPTO scan is available here. (Please let me know if I've missed any OCR typos.) The original USPTO scan is available for download at right. |
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And finally, just because I Iike the old fashioned patent illustrations, here's a gallery of all of those mentioned here: