3M (NYSE: MMM) and Stanley Black & Decker (NYSE: SWK) have two of the longest dividend-paying streaks in the market. Not all companies pay dividends to their shareholders, but when one successfully does so for decades -- as 3M and Stanley Black & Decker have -- that generally reflects that it's a strong business with a history of growing revenue and profits. At the moment investors have a once-in-a-decade opportunity to buy these top income stocks while their dividend yields are elevated.