A treatise on the law and practice relating to letters patent for inventions :
Frost, Robert, b. 1859.
A 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. - 2nd ed. - London : Stevens, 1898. - lv, 919p.
Patent laws and legislation--Great Britain.
A 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. - 2nd ed. - London : Stevens, 1898. - lv, 919p.
Patent laws and legislation--Great Britain.