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Inking ribbon
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Patent number 5,158,929
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Issue date Oct 27, 1992
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Mannesmann AG
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Ferdinand Quella
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Method of producing glass carbon
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Patent number 4,426,368
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Issue date Jan 17, 1984
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Siemens Aktiengesellschaft
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Ferdinand Quella
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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Colored lamp
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Patent number 4,382,272
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Issue date May 3, 1983
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Siemens Aktiengesellschaft
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Ferdinand Quella
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Passive display device
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Patent number 4,377,750
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Issue date Mar 22, 1983
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Siemens Aktiengesellschaft
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Heinz Pape
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G02 - OPTICS
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Device for collecting light
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Patent number 4,257,676
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Issue date Mar 24, 1981
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Siemens Aktiengesellschaft
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Waldemar Greubel
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...