noun
joint invention
Refers to an invention created by two or more people together. Often used in patent contexts.
この技術は二人の共同発明です。
This technology is a joint invention by two people.
共同発明者として特許を申請した。
They applied for a patent as joint inventors.
共同開発 (joint development) is broader and can refer to any collaborative development, while 共同発明 specifically refers to an invention.
Compound of 共同 (joint, collaborative) and 発明 (invention).