Patterson Companies Fourth Quarter Conference Call Scheduled for May 26, 2005

ST. PAUL, Minn.--May 12, 2005--Patterson Companies today announced that it will hold its conference call to review operating results for the fourth quarter of fiscal 2005 on Thursday, May 26, 2005 at 10:00 AM Eastern. The fourth quarter earnings release will be issued before the market opens that day.

Investors can access a live webcast of the conference call by visiting the investor relations section of the Patterson Companies website, www.pattersoncompanies.com. The webcast will be archived on Patterson's website. Following the conference call, a replay will be available at 303-590-3000 with the 11030456 confirmation code through June 2.

About Patterson

Patterson Companies, Inc. is a value-added distributor serving the dental, companion-pet veterinarian and rehabilitation supply markets.

Dental Market

As Patterson's largest business, Patterson Dental Supply, Inc. provides a virtually complete range of consumable dental products, equipment and software, turnkey digital solutions and value-added services to dentists and dental laboratories throughout North America.

Veterinary Market

Webster Veterinary Supply, Inc. is the nation's second largest distributor of consumable veterinary supplies, equipment, diagnostic products, vaccines and pharmaceuticals to companion-pet veterinary clinics.

Rehabilitation Market

AbilityOne Products Corp. is the world's leading distributor of rehabilitation supplies and non-wheelchair assistive patient products to the physical and occupational therapy markets. The unit's global customer base includes hospitals, long-term care facilities, clinics and dealers.