Radio International placed many of their radio shows on the iTunes platform. In addition, major local radio stations like WNYC in New York City, WHYY-FM radio in Philadelphia, and KCRW in Los Angeles placed their programs on their websites and later on the iTunes platform. Concurrently, CNET, This Week in Tech, and later Bloomberg Radio, the Financial Times, and other for-profit companies provided podcast content, some using podcasting as their only distribution system. As of early 2019, the podcasting industry still generated little overall revenue, although the number of persons who listen to podcasts continues to grow steadily. Edison Research, which issues the Podcast Consumer quarterly tracking report, estimates that in 2019, 90 million persons in the U.S. had listened to a podcast in the last month. As of 2020, 58% of the population of South Korea and 40% of the Spanish population had listened to a podcast in the last month. 12.5% of the UK population had listened to a podcast in the last week and 22% of the United States population listens to at least one podcast weekly. The form is also acclaimed for its low overhead for a creator to start and maintain their show, merely requiring a good-quality microphone, a computer or mobile device and associated software to edit and upload the final product, and some form of acoustic quieting. Podcast creators tend to have a good listener base because of their relationships with the listeners. IP issues in trademark and patent law Trademark applications Between February March 10 and 25, 2005, Shae Spencer Management, LLC of Fairport, New York filed a trademark application to register the term "podcast" for an "online prerecorded radio program over the internet". On September 9, 2005, the United States Patent and Trademark Office (USPTO) rejected the application, citing Wikipedia's podcast entry as describing the history of the term. The company amended their application in March 2006, but the USPTO rejected the amended application as not sufficiently differentiated from the original. In November 2006, the application was marked as abandoned. Apple trademark protections On September 26, 2004, it was reported that Apple Inc. had started to crack down on businesses using the string "POD", in product and company names. Apple sent a cease and desist letter that week to Podcast Ready, Inc., which markets an application known as "myPodder". Lawyers for Apple contended that the term "pod" has been used by