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Unlike patents, there is little academic research examining industry use of trademarks. e 2012
report oered what may be the rst comprehensive analysis of trademark use by U.S. industries
that is grounded in original research, data, and measurement theory. e methodology applied
in the current report and detailed below is derived from what was designed in the 2012 report.
As a preliminary matter, we recognized that each trademark registration has a description of the
type of good or service with which the protected mark is used in commerce. e USPTO classi-
es goods and services for administrative convenience, and applicants for trademark registration
must provide a separate description — and pay separate application and maintenance fees — for
each “class” in which the goods or services associated with the trademark is classied.
46
is
makes working with trademark registration data dierent from working with patent grant data.
Trademark application and maintenance fees are assessed on a per-class basis, and registration
holders may elect to renew their registrations with respect to some but not all classes.
47
As a
result, holding a “multi-class” registration is practically equivalent to holding multiple registra-
tions, one for each class. Accordingly, in the foregoing analysis each class listed on a registration
was considered as the unit of analysis, creating a class-registration count. For example, if one
mark (or logo) is registered in three classes,
48
then our input measure in the analysis reects three
trademark registration counts, one for each class.
e approach that we adopted for measuring trademark-intensive industries parallels, but diers
from, the approach employed when analyzing patents. For patents, each patent was counted only
once overall; for trademark measurements, each mark is counted once for each class in which
it belongs, potentially counting it more than once overall according to the number of classes in
which it is registered. Since it is not easy to ascertain which trademarks are relatively more im-
portant, we use the best measure available, based on the economic realities of the fee system.
49
Because each trademark registration-class involves some xed ling fee paid to the USPTO, the
more classes in which a trademark is registered indicate more times that a fee has been paid to
the USPTO. Using these fee-payments is an eective method to base an IP-intensity measure and
this approach was followed consistently for both trademarks and patents.
46 For a list of classes, see Trademark Manual of Examining Procedure (TMEP) chapter 1400 (April 2016 edition). Fees
also are a function of the type of application form used. For more information on the trademarking process, see Trade-
mark Basicsatwww.uspto.gov/trademarks/basics/BasicFacts_with_correct_links.pdf.
47 Each class used to group the goods or services in a registration for purposes of administrative fee payments may cover
a wide variety of goods or services. A trademark right exists as to each good or service on or in connection with which
themarkisused.Theclassicationofthegoodsandservicesdoesnotdeterminethescopeoftheprotectiongiventoa
mark.
48 Anexampleisthemark“Nike”beingregisteredinclassesassociatedwith(a)software,(b)golfequipment,and(c)
eyewear. See U.S. trademark registration numbers 3406594, 3389746, and 3081688, each by Nike, Inc.
49 Wecouldweightcompaniesbynumberofemployees,butitismoredifculttodecidewhetheragiventrademark
taken by itself should be weighted heavily or lightly.