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Terms for subject Patents containing improvements of | all forms | in specified order only
EnglishGerman
improvement of another inventionVerbesserung einer anderen Erfindung
invention of improvementVerbesserungserfindung
patent of improvementVerbesserungspatent
patent of improvement withheld from reduction to practice in the hope of future useVorratspatent
patent of improvement withheld from reduction to practice in the hope of future useAusbaupatent

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