| http://www.w3.org/ns/prov#value | - Examples of these devices are disclosed in the specifications of the following patents: German Pat. Nos. 102693, 306287, 501505, 556493, 62252, 1233981, 1148355, 1933350, 2020435, 2160561, 2942631, 30259361 and 3139135; French Pat. Nos 727129, 783708, 914188, 2270897, 2276840, and 2440742; British Pat. Nos. 197946, 421708, 1435520, 1475710, 1490974, 1448473, 1343385, 1294808, 1242694, 1107780, 201
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