During the last three weeks, sixty-five patents have been issued to applicants whose papers were prepared at the Scientific American Patent Agency. This is unprecedented in the history of inventive progress, and cannot fail to attract the attention of all who have patent business to transact. We pay special attention not only to the preparation of applications, but also to rejected cases. We invite all who have such cases to correspond with US. Our force is equal to any amount of business of this character that may come into our hands. Circulars of information sent free.