Kodak announced in a Securities and Exchange Commission (SEC) filing on Monday that there was "substantial doubt" about the company's ability to stay in business. Kodak at one time dominated the U.S. film market. It became a household name, known for products like disposable cameras, and at its peak, controlled over 80% of the U.S. film market. Kodak invented the first digital camera in 1975, but failed to embrace the technology, fearing it would cannibalize its film business. WORLD’S MOST POWERFUL DIGITAL CAMERA CAPTURES HISTORIC FIRST IMAGESWhen digital photography took over, Kodak’s core business collapsed.