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Patent Document Type and Number Definitions

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Patent and Trademark Depository Library Program

Patent Document Type and Number Definitions

Following are examples and breakdowns of the different types of patents and trademarks.

Type

Number

Examples

Utility

7 digits

3394738

Design

D + 6 digits

D277050

Plant

PP + 5 digits

PP13845

Defensive Publication

T + 6 digits

T103201

Statutory Invention Registration (SIR)

H + 7 digits

H0000016

Certificate of Correction

Original Document Number Format

Reexamination Certificate

B + 7 digits

B14208747

Reissue Design

RD + 5 digits

RD28854

Reissue Plant

RP + 5 digits

RP28304

Reissue Utility

RE + 5 digits

RE29774

Reexamination Certificate of Reissue

B + RE + 5 digits

BRE28576

"X" Patents

X + 000 + 4 digits

X0004325

"X" Patent Reissue

RX + 4digits

RX4325

Additional Improvements

AI + 4 digits

AI0013

Trademark Registration

7 Digits

0692593

Trademark Registration(Post-Issuance Document)

7 digits

0703255

Last Modified: December 13, 1996

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