The OCR that Google Patents originates has been edited to make this patent full-text-searchable and easy to read.

There are 3 formats available: .pdf (original), .txt (clean text), and .brf (braille file). .brf is a file format used by the blind. See the "all files HTTP" link to access all three.

During the editing process, a diligent attempt has been made to correctly discern every reference character, date, measurement, etc. set forth in the patent, and the majority by far are correct. However, because the OCR process is not entirely accurate and because inference is difficult at times, there may be some of these that are inconsistent or incorrect.

In the .txt and .brf formats of this patent, a stand-alone or punctuated dash denotes a word or phrase that could not be deciphered. . Also, in these formats inventor's and witnesses' signatures have been deleted.

These documents are all in the public domain.

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