The Mod 4 series was introduced in 1974 but was generally not successful in the marketplace. That computer program led to the development of a cordless miniature vacuum cleaner. Black & Decker was tasked with the job, and developed a computer program to optimize the design of the drill's motor and ensure minimal power consumption. The design originated from the Apollo space mission, where NASA required a portable, self-contained drill capable of extracting core samples from the lunar surface. The device uses suction power to pick up fine dirt and debris including pet hair. Mark Proett was an engineer whose utility patent was for B&D's Model 9321 cordless vacuum cleaner, called the Spot Vac, a component of the Mod 4 series of power tools (shrub trimmer, lantern, grass shear, drill, and Spot Vac), all powered by a single, rechargeable, and interchangeable "energy pak" handle with batteries. Mark Proett and Carroll Gantz are listed as the inventors on the utility and design patents, respectively, assigned to Black & Decker for a cordless vacuum cleaner. Looking for more vacuum guides? Check out our reviews of stick vacuums, vacuums for pet hair, and canister vacuums.The Black & Decker DustBuster (now stylized as DUSTBUSTER) is a cordless vacuum cleaner that was introduced in January 1979. We also highlighted notable features, including attachments, battery life, filtration systems, and LED lights on vacuum heads. We focused on popular, well-respected brands-think Dyson, Hoover, and Black+Decker-and offered a selection across price points, from budget to high-end. Our lineup includes everything from wet-dry vacs to lightweight models to uprights, all with ratings of at least four stars. We dug into our own extensive research on vacuums, as we've tested the best handheld vacuums and the best robot vacuums, and several are cordless models. There are also smart vacuums on the market so you can geek out on tracking performance and getting cleaning reports via app. If you’re an allergy sufferer or have a pet, consider going for a model with a HEPA filter or a whole-machine filtration system that will remove dander and fine dust particles from surfaces. Beyond that, it’s all about special features. Battery life is another factor, and, as a general rule, runtime increases with price. As for weight, you’re looking at 10 pounds or less-we feature one that's under 5.5 pounds-and many cordless vacuums convert to a handheld. Typically, most cordless vacuums fall into the latter category, though there are bagged models out there for anyone who hates the idea of emptying a dustbin. Since you’ve already decided to go cordless, next up is bag versus no bag.
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