Treatise on the law and practice relating to letters patent for inventions :
Frost, Robert, b. 1859.
Treatise on the law and practice relating to letters patent for inventions : with an appendix of statutes, international conventions, rules, forms and precedents, orders, &c. / by Robert Frost. - 4th ed. - London : Stevens and Haynes, 1912. - 2 v.
Patent laws and legislation--Great Britain.
Treatise on the law and practice relating to letters patent for inventions : with an appendix of statutes, international conventions, rules, forms and precedents, orders, &c. / by Robert Frost. - 4th ed. - London : Stevens and Haynes, 1912. - 2 v.
Patent laws and legislation--Great Britain.