Warren R. Cox did successfully apply for one of the new broadcasting licences, which was issued on February 21, 1922 for WHK in Cleveland. The station is still on the air with the original call letters.
 
Cleveland Plain Dealer, February 4, 1922, page 1:

RADIO  BAN  ANNOUNCED
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U. S.  Official  Forbids  Amateur  Wireless  Concerts.

    Broadcasting by amatuer radiophones of musical concerts, speeches and news has been ordered stopped, E. H. Poad, president of the Cleveland Radio Association, announced yesterday.
    The order, Mr. Poad said, came from the government inspector covering this area out of Detroit, and has been radiophoned to all amateur stations in the area.
Cleveland Plain Dealer, February 5, 1922, page 5A:

CHECK  RADIO  AMATEURS
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U. S.  Says  Broadcasting  Hindrance  to  Regular  Service.

    WASHINGTON. Feb. 4.--Orders for temporary suspension of radio broadcasting by amateurs because of interference caused regular radio service was announced today by the commerce department.
    New regulations, however, will be issued covering amateur broadcasting as soon as some desirable plan can be formulated.
    Radio broadcasting, the department explained, is a new wireless service which has developed very rapidly during the last three months and now embraces the sending out of everything from market quotations and crop estimates, health talks, weather forecasts, lectures, sermons, music and announcements as to stolen automobiles.
    The result has been to fill the air with radio reports to the detriment of commercial and necessary service.
Cleveland Plain Dealer, February 5, 1922, page 5A:

Amateurs  Wonder  at  Radio  Mandate
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Questions  U.  S.  Ruling  While  Others  Say  It  Will  Aid  Development
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    Is the order prohibiting amateurs from broadcasting music and other forms of entertainment by radiophone a move instigated by powerful interests to tighten their grip on the wireless world? Or is it a ruling which will have a very beneficial effect on radio development?
    These are questions Cleveland amateurs were asking yesterday after the promulgation of the order of S. W. Edwards of Detroit, government radio inspector for this district.
    That the manufacture and sale of wireless apparatus has become centralized under the control of a few large companies is common talk among radio enthusiasts. Rivalry among five concerns in buying basic patents has been succeeded by "pooling of parents."
Broadcasting  is  Limited.
    Under the ruling, broadcasting is limited to stations whose operators secure the limited commercial license from the federal radio service of the bureau of navigation.
    Among Cleveland wireless operators who have applied for the limited commercial license is Warren R. Cox of 3138 Payne avenue N. E., whose station--8-ACS--has been used to broadcast the weekly concerts of the Cleveland Radio Association for the last few months.
    "It is to be deplored that this order is directed apparently at the amateur," said Edwin H. Poad, president of the association, last night. "In a sense however, this action is the punishment all must take for the misconduct of a few, who flagrantly violated the wave length clause of their license."
    "As 'listening-in' stations increase, the need of less interference from amateur operators becomes more apparent and the new ruling, therefore, will ultimately prove a boon to all who are in the radio field for entertainment," said Cox. "So while this move may be criticized by amateurs generally, it is one which will yield more and more benefits as radio expands."
Thinks  Ruling  Will  Aid  Business.
    "This ruling is a great forward step in the development of radiophone broadcasting," said J. S. Newman, president of the Newman-Stern Co., E. 12th street, one of the city's oldest distributors of radio equipment. "It is designed to foster the best features of this new and useful art. The ruling in no way affects receiving equipment; on the contrary, it should encourage the use of it."
    "This ruling has been in contemplation by the government for a long time," declared Richmond L. Rathbone, manager of the Cleveland office of Westinghouse, Swetland building, yesterday.
    "It has been increasingly apparent that amateurs who are not properly qualified to broadcast have been interfering with those who are. This ruling will clarify the atmosphere and will raise the standards of wireless entertainment to heights heretofore unapproached."