MAGNUSON-MOSS Warranty Improvement Act
United States Code Annotated  Title 15 Commerce and Trade
Chapter 50 Consumer Product Warranties 15 Section 2302

(c) No warrantor of a consumer product may condition his written or implied warranty of such product on the consumer’s using, in connection with such product, any article or service (other than article or service provided without charge under the terms of the warranty) which is identified by brand, trade or corporate name; except that the prohibition of this subsection may be waived by the Commission if:

1. The warrantor satisfies the Commission that the warranted product will function properly only if the article or service so identified is used in connection with the warranted product, and
2. The Commission finds that such a waiver is in the public interest.

How This Affects You!
The use of our printer cartridges does not void your printer warranty.  The manufacturer of the printer you are using cannot void the warranty on your printer because you use a cartridge or refill kit manufactured by someone other than the printer manufacturer. This prohibition includes the use of compatible cartridges and re-manufactured cartridges.

U.S. law also prohibits the manufacturers of your equipment from requiring the use of OEM ink or toner or charging extra fees if you use products other than OEM products with their equipment.  Those requirements and/or fees are in violation of existing anti-trust acts:
The Sherman and Clayton Antitrust Acts
(see also: Supreme Court decision: IBM vs. The United States 1936)
http://www.usdoj.gov/atr/public/div_stats/1638.htm
http://www.ftc.gov/bcp/conline/pubs/buspubs/warranty.htm

IBM vs. The United States
(The Sherman and Clayton Antitrust Law)
The Supreme Court (IBM vs. The United States) held that IBM could not threaten customers with termination of their data processing equipment leases just because they did not use supplies manufactured by IBM.  Such practice constituted a tying agreement and was found to be in violation of the Sherman and Clayton Antitrust Law.

How This Affects You!
Free choice of vendor allows for competition and keeps prices affordable. Your printer manufacturers are aware of lower priced compatible/refilled and re-manufactured ink and toner cartridges. Threatening to void warranties and add additional service call charges for use of compatible ink or toner are their way of trying to limit competition. Save this information to protect yourself against these illegal actions.

Printing Essentials is Heiber Compliant!  Feel safe with our product.
 
The Heiber patents (U.S. Patent Nos. 5,223,068, 5,525,183, 5,407,518, 5,676,794) cover methods and equipment for the splitting and resealing of many of the popular HP models.  Printer Essentials is committed to providing the best product and protecting intellectual property and has entered into a licensing agreement with Heiber Patent Licensing, Inc.  As a result, any toner product purchased from us is compliant with these patents whether through the use of licensed seals and splitters or through our payment of a royalty on the other cartridges.