In 1849, Lindeman made Herman a partner, and the firm moved to 56 Franklin street. The 1855 New York Census reported Lindeman & Son employed about 15 and produced $18,000 worth of pianos (about $ today) - representing about one percent of the combined output of the piano factories in New York City as reported in the New York State census of 1855."Census of the State of New-York" Charles Van Benthuysen, Albany 1857 p.403</ref> They were awarded a diploma at the 1857 American Institute fair, placing after Schuetze & Ludolff, Gross & Hulskamp, Boardman & Gray and Henry Hansen.