Perris v. Hexamer’s Empirical Analysis

Citation profile

29 federal appellate · 14 district ·

Most-quoted passages

The sentences later courts lift from this opinion, ranked by how many decisions quote each — the parts of the opinion doing the work. These counts are smaller than the citation total above because most of the 77 citing decisions cite the case generally; a passage count includes only decisions quoting that exact language verbatim.

1. ““A copyright gives the author or the publisher the exclusive right of multiplying copies of what he has written or printed. It follows that, to infringe this right, a substantial copy of the whole or of a material part must be produced.””

   4 later decisions quote this exact passage · from the majority
   e.g. White-Smith Music Pub. Co. v. Apollo Co. · Bobbs-Merrill Co. v. Straus

2. ““The maps were made after a careful survey and examination of the lots and buildings in the enumerated wards of the city, and were so marked with arbitrary coloring and signs, explained by a reference or key, that an insurer could see at a glance what were the general characteristics of the different buildings within the territory delineated, and many other details of construction and occupancy necessary for his information when taking risks. They are useful contrivances for the dispatch of business, but of no value whatever except in connection with the identical property they purport to describe.” “The defendant made the necessary examination and survey, and pub- ' lished a similar series of maps of Philadelphia. ■ At first, he used substantially the same system of coloring and signs, and consequently substantially the same kej'-, that had been adopted by the complainants, but afterwards he changed his signs somewhat, and, of course, changed his key. The question we are to consider is whether the publication of the defendant infringes the copyright of the complainants, and we think it does not. A copyright gives the author or publisher the exclusive right of multiplying copies of what he has written or printed. * * * It needs no argument to show that the defendant’s maps are not copies, either in whole or in part, of those of the complainants. They are arranged substantially on the same plan, but those of the defendant represent Philadelphia, while those of the complainant ”

   1 later decision quote this exact passage · from the majority
   e.g. Burnell v. Chown

3. ““The right of an author or a publisher, under the copyright law, is infringed only when other persons produce a substantial copy of the whole, or of a material part, of the book or other thing for which he secured a copyright. Where, therefore, the owners of a copyright for maps of certain wards of ‘the city of New York, surveyed under the direction of insurance companies of said city, which exhibit each lot and building, and the classes as shown by the different coloring and characters set forth in the reference,’ brought his bill to restrain the publication of similar maps of the city of Philadelphia, held, that the bill could not be sustained.””

   1 later decision quote this exact passage
   e.g. Burnell v. Chown