2 电子书 Ann Rothschild
Alan Rothschild & Ann Rothschild: Inventing a Better Mousetrap
Learn about the role that patent models played in American history–and even learn to build your own replica!Patent models, working models required for US patent filings from 1790 to 1880, offer insi …
EPUB
英语
DRM
€9.01
Alan Rothschild & Ann Rothschild: Inventing a Better Mousetrap
Learn about the role that patent models played in American history–and even learn to build your own replica!Patent models, working models required for US patent filings from 1790 to 1880, offer insi …
PDF
英语
DRM
€9.00
