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This category uses the form Techtype. These designations are largely pertinent to our Smart, or Advanced, or Classification Espacenet searches. A great deal of this material, largely pertinent to the years just preceding, and long-following, 1900, was found by way of this resource, largely using the designation "B64" (in the IPC and-or CPC fields), cross-referenced with of timespans of interest. Though these techtype designations were later and internationally applied, and though espacenet doesn't seem to reach far before 1900, the material which it does include is rich in original documents, from which national techtypes may often be garnered.

Pages in category "Techtypes"

The following 200 pages are in this category, out of 1,863 total.

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