The U.S. Patent and Trademark office may be contacted at (800) 786-9199. The website address is www.uspto.gov.
Letter of Inquiry—Patents
[Date]
U.S. Patent and Trademark Office
Office of Electronic Product
Madison East Building
600 Delaney
Alexandria, VA 22314
[Salutation]
Please research the past twenty years of patents and advise me if [name] of [city] has been awarded any patents or applied for any patents.
Please send me copies of all pertinent documents.
My check for $[amount] for your fee is enclosed.
Sincerely yours,
[Name of attorney]
Enc.