What early commercial success provided Edison with the capital to fund his Menlo Park experiments?
Answer
Improving the stock ticker system.
Edison secured patents for an improved stock ticker, the profits from which funded his more ambitious experiments at the Menlo Park laboratory.

Related Questions
What radical shift did Edison implement regarding the process of invention?In what year was the phonograph introduced?What early commercial success provided Edison with the capital to fund his Menlo Park experiments?What immediate societal change resulted from affordable electric illumination?What specific material did Edison's team eventually settle on for the light bulb filament?What became the enduring legacy model derived from Edison's organized research environment?How did the initial demonstration of the phonograph physically capture sound?What aspect of gas lighting did electric light substantially improve in terms of safety and environment?According to the text, what crucial realization underpinned the success of Edison's inventions like the light bulb?What three primary areas constituted Edison's first major cultural and societal footprint?