How to say "patent" in Japanese

• 特許とっきょJLPT N1approx.Common
  nounCovers 'patent' in its main sense: a legal right protecting an invention. This is the word to use for patents in intellectual-property and legal contexts.
• 専売特許せんばいとっきょCommon
  nounA dated term for 'patent', found chiefly in historical writing about the early patent system; 特許 has taken its place, so this is seldom the word you want.

For 'patent' as a legal right to an invention, use 特許; 専売特許 is a dated synonym, met mainly in historical contexts, so 特許 is the choice in virtually every situation.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 特許とっきょpatent
• 専売特許せんばいとっきょpatent
• パテントpatent
• 白々しいしらじらしいbarefaced (e.g. lie)
• しらこいbarefaced (e.g. lie)