Inventor's manual, how to work a patent to make it pay : a guide for inventors, in perfecting their inventions, taking out their patents, and disposing of them, and cautions as to pitfalls for the unwary
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書誌事項
Inventor's manual, how to work a patent to make it pay : a guide for inventors, in perfecting their inventions, taking out their patents, and disposing of them, and cautions as to pitfalls for the unwary
The Norman W. Henley, 1924
3d ed., rev. and enl., including the new 1920 census of the United States by counties containing a population of over ten thousand
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Inventor's manual
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Includes index
