You may use it so long as it constitutes a "fair use" of the work. Whether the use is fair depends on several factors, including the nature of the work and how much you are quoting. If you are using a relatively small quote as part of a much larger work, you may be okay. However, fair use is complex and there are no bright line rules to determine whether your use is fair. Your best bet is to contact a copyright attorney, who can review the artwork you have in mind with you. Best of luck to you.
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You should talk more specifically to a patent attorney. It will take some expenditure on your part to determine whether your invention is patentable. If it is, while you may not have great resources, if your idea is a great one, you may be able to obtain angel or other funding options.
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