W. J. JOHNSTON, Proprietor. GEO. H. STOCKBRIDGE, Manager. 



168-177 Potter Building, New York. 



Electrical Cases of a Complicated and Difficult Character a Specialty. 



This Agency continues to apply for patents on inventions in all countries where patents 

 are obtainable, and to make A SPECIALTY OF ELECTRICAL CASES. Its facilities have lately 

 been much increased and improved, and its clients can rest assured that their interests will 

 always be faithfully and conscientiously studied and zealously watched over by competent 

 experts, and that the work on their applications will be performed in a prompt, thorough 

 and painstaking manner. 



Mr. Stockbridge, the Manager of the Agency, is a graduate of the United States Patent 

 Office. Choosing electricity as his specialty, he devoted his entire attention in the Patent 

 Office to inventions in that line. He had charge of a number of the sub-divisions in the Class 

 of Electricity, and made examinations at various times in all of them, thus familiarizing 

 himself with the whole range of electrical invention. 



We have a standing order at Washington for copies of the specifications and drawings of 

 all electrical patents as they are issued, and our library contains every work relating directly 

 or indirectly to electricity. For more than a decade our business has made us familiar with 

 the progress and development in electrical matters. We know what has been done in any 

 separate branch or in regard to any particular application of electricity, and we can readily 

 tell what, if anything, has already been accomplished in the field to which belongs any case 

 placed in our hands. We can also on the one hand appreciate the importance of the inven- 

 tion, and knowing that no one else has patented anything of the same nature, secure a 

 foundation patent with broad claims covering every probable use of it, or on the other hand, 

 we can te 1 the client at once just how much has been done in the same direction, and what 

 there is left for him to claim. It certainly stands to reason that with all this knowledge and 

 with the facilities at our disposal, we can prosecute applications for patents in electrical 

 cases better, more thoroughly, and at less expense to the client, than can the ordinary patent 

 solicitor lacking this special information, special training and special mastery of the subject 

 in all its details. It al-so goes without saying that our clients have very little trouble in such 

 cases. Understanding tue subject thoroughly, we can readily see the points they make, and 

 not unfrequently suggest additional ones. We also prepare drawings so simple and intelli- 

 gible that there is no friction in the Patent Office. 



Capitalists, projectors of companies and others desiring Expert. Reports on inventions or 

 systems, can rely upon getting honest, impartial and thoroughly competent advice. 



Inventors are cordially invited to correspond with us, or to call and see us. We make no 

 charge for advice by mail or for consultation regarding any case in which our professional 

 services may be required, and we are always glad to furnish information and to assist 

 inventors in perfecting their devices and attaining satisfactory results. 



Correspondence solicited. All communications treated with inviolable secrecy. Address 



JOHNSTON'S PATENT AGENCY, 



168-177 Potter Building, - - NEW YORK. 



