. The Scientific American reference book; a compendium of useful information for inventors and mechanics, containing the complete patent laws of the United States ... forms for patents, caveats, assignments, licenses, and shop rights ... etc., etc . THB MODEL KOOM. SCIENTIFIC AMEUICAN ESTABLISHMENT. 37 1 Jl^^Mi^^^^^r/ s l^lWil ^ ^^^MMiiiiii^gg^ffl^^ ^^^^^^Bi r% l™if— ^ Bi ^^S^jl^LLji^i) |M^^^HE i ^B ^^ ^k ^2 ^^ Km S^ 02 ^ ^5 7^5 ^^^ti^^^^^^^^^^^B-. -, nbJiJii /^^ V o|^MBllj^mg^^^^^^MlillllllllillillllifE!9 ^ —W^^SL^^sii^^^^^^S^^^^ ^^^ii^^^^^ i^ b?-=AlH^^^SS W •^^-^— -. •. \—^^ m^ ^^^^M 1 r


. The Scientific American reference book; a compendium of useful information for inventors and mechanics, containing the complete patent laws of the United States ... forms for patents, caveats, assignments, licenses, and shop rights ... etc., etc . THB MODEL KOOM. SCIENTIFIC AMEUICAN ESTABLISHMENT. 37 1 Jl^^Mi^^^^^r/ s l^lWil ^ ^^^MMiiiiii^gg^ffl^^ ^^^^^^Bi r% l™if— ^ Bi ^^S^jl^LLji^i) |M^^^HE i ^B ^^ ^k ^2 ^^ Km S^ 02 ^ ^5 7^5 ^^^ti^^^^^^^^^^^B-. -, nbJiJii /^^ V o|^MBllj^mg^^^^^^MlillllllllillillllifE!9 ^ —W^^SL^^sii^^^^^^S^^^^ ^^^ii^^^^^ i^ b?-=AlH^^^SS W •^^-^— -. •. \—^^ m^ ^^^^M 1 r * 1, > i^^^^HW^ -jiifl || ij I ^a 1 ?pl|^^^^^(^^SMf^^^^l^^^^^^^^^^^tf|||l III 1 :r\ 1 ^S^ JB^ „ ^ R ^^W^^ )^ 111^^^^ W Mi^^^^^ll I^^^^H ^ ^^^S |f\W-^^^^^ 38 SCIENTIFIC AMEEICAIS- ESTABLISHMENT. sional career of over thirty years, not one of ourclients lias ever found his confidence in us carrying on our extensive Patent Business, weaim to conduct it in the most expeditious and systema-tic BEANCH OFFICE OF THE SCIENTIFIC AMEKICAN, WASHINGTON. We are assisted by the most experienced examinersand specification writers, many of whom have beenofficers in the Patent-Office. The finest mechanicaldraughtsmen in the country prepare our drawings. We have a large office in Washington, located at thecorner of F and 7tli streets, diagonally across thestreet from the Patent-Office, as shown in the engrav-ing. The first building on the right is the U. S. Patent-Office ; the next on the same side is the General Post-Office ; on the left stands the Scientific American location is especially convenient for the transactionof business. We employ at Washington a corps oftrained assistants, part of whom make it their exclu-sive duty to watch and assist the progress of our casesbefore the Patent-Office. Another division of our helpers in Washington de- SCIENTIFIC AMERICAIS ESTABLISHMENT. 39 vote tliemselves to tlie Preliminary Examination ofInventi


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