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patent number concordance
patent number index
patent of addition
patent of importation
patent of improvement
patent of introduction
patent of invention
patent of precedence
patent of revalidation
参考
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Wikipedia
Wiktionary
EN↔CN 海词
DE↔EN Linguee
EN→DE Collins
DE↔EN LEO
DE↔EN Langenscheidt
DE↔EN PONS
DE↔EN Beolingus
DE↔EN dict.cc
patent of improvement
➞
patent of improvement
Definitions
[1]
[专利]
改进（的）专利
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patent of improvement