<human>:  Was Mark Twain a struggling inventor?
<bot>: No, Mark Twain was an American author and humorist. He was not a struggling inventor. Twain patented three inventions. Twain created and sold over 25,000 self-pasting scrapbook creations. Twain invented an improvement in adjustable and detachable straps for garments to replace suspenders. So he was not a struggling inventor at all.