Slot Machines and Slot Patents


Slot machines are machines that accept paper tickets with barcodes or cash as payment. These machines spin a series of reels and payouts based on a paytable. The symbols on a slot machine vary by theme. Some classic symbols include fruit, bells, and stylized lucky sevens. Bonus rounds are often aligned with the theme.


A slot patent is a device that transmits a spinning force from its base to its core. This patent’s core is made of a material that is similar to knurling. The slot patent claims a number of advantages over the prior art, including a simpler and less dangerous design. This article examines the prior art and analyzes whether or not the claimed features are obvious.

If the slot patent claims are valid and enforceable, the defendant would have had a license to practice the slot invention prior to February 1971.

Payback percentages

The payback percentage is an important statistic to keep in mind when playing slots. It is the ratio of the expected payout to the amount wagered. For instance, a 95% payback machine will return 95% of the money bet. Conversely, a 5% payback machine will only return 5% of the money wagered. These payout percentages are calculated based on the average return that a casino expects to see from a slot machine. But, these percentages will vary from one machine to the next.

While there are no federal laws that require casinos to publish their payback percentages, many states do. For example, New Jersey and Nevada require casinos to publish their payback percentages. However, Michigan does not require casinos to publish their payback percentages. Also, Indian casinos are not required to disclose their payback percentages.


Regulations for slot allocation are currently under review. The proposed rules will require manufacturers to submit documentation and test new designs. They are set to take effect in January 2020. Businesses may want to speak to an attorney about how the new regulations could affect their business. The changes are designed to make the industry more competitive and reduce congestion.

The new regulations are designed to prevent ghettoization. The new laws will also limit the locations of slot machines. They will have to be located at least 500 meters from sensitive locations.