葉忠福

創新發明原理與應用 = = Principle and application of innovation / by: 葉忠福 (Language materials, printed)

創新發明原理與應用 = = Principle and application of innovation / by: 葉忠福 (Language materials, printed)

創新管理 = = Innovation management : innovation and patent protection practice : 創意發明與專利保護實務 / by: 黃秉鈞; 葉忠福 (Language materials, printed)