Because of its size, his invention did not click. In 1905, Walter Griffiths patented a similar device that is smaller in size. He called it the Griffith's Improved Vacuum Apparatus for Removing Dust from Carpets." Manually operated, a person need to compress a bellows-like contraption in order to suck in the dust, which will pass through a flexible pipe. Rotating brush agitates soil residues and dust molecules and before they start spreading, the vacuum cleaner has made its job. Power operated, these kinds have electric motors to run, either single or dual. WET/DRY VACUUM CLEANERS: These are special kinds designed to seep even spills of liquid. It has good exhaust system to reverse the flow of air for purposes of unclogging the tubes after significant use. Also, especially with newer car models, heavy dust can cause damage to the computer and electronic devices usually found behind the dashboard. Garbage also piles up fast. Before you even realize, your back seat's floor resembles a dumpster. In cleaning your car, your first step would be to vacuum the interior. that first released a large cordless vacuum cleaner with wheels sometime in the early 2000s, this according to The Nikkei Weekly. The earlier Hitachi version of large cordless vacuum cleaners had a total of 25 minutes run time after the internal batteries were charged for six hours. Today some large cordless vacuum cleaners can continuously clean for 60 minutes after 2 hours of charging. This company has been in the business for more than 60 years coming up with other products such as dishwashers, cleaning products and coffee systems with its goods being sold in Europe and in the United States. Another company that can deliver excellent products and service is the company known as Electrolux that has offices around the world. But if the individual does not have time, the store can go to the customer. Companies such as Electrolux or Kirby, has been doing this kind of business for more than 40 years. The marketing strategy used by these two companies is quite unique. Agents go house-to-house showing of the Kirby product line and after doing a free demonstration are able to impress the homeowner into buying a unit.