US · rules
D. Md. L.R. 804.1
Cases Involving Claims of Infringement
Unless otherwise ordered by the Court, in all cases other than those arising under the
Hatch-Waxman Act (21 U.S.C. § 355), in which a party has asserted a claim of patent
infringement, the parties shall make the following disclosures.
a) Initial Disclosure of Infringement Contentions
Twenty-eight (28) days from the date of the Scheduling Order, any party claiming patent
infringement shall serve on all parties an Initial Disclosure of Infringement Contentions,
separately setting forth for each allegedly infringing party, the following information:
i. Each claim of each patent in suit that is allegedly infringed by each
allegedly infringing party, including for each claim the applicable statutory
subsections of 35 U.S.C. § 271 asserted;
ii. Separately for each allegedly infringed claim, each accused apparatus,
product, device, process, method, act, or other instrumentality (“Accused
Instrumentality”) of each allegedly infringing party of which the party is
aware. This identification shall be as specific as possible. Each product,
device, and apparatus shall be identified by name or model number, if
known. Each method or process shall be identified by name, if known, or
by any product, device, or apparatus which, when used, allegedly results in
the practice of the claimed method or process;
iii. A chart identifying specifically where each limitation of each asserted claim
is found within each Accused Instrumentality, including for each limitation
that such party contends is governed by pre-AIA 35 U.S.C. § 112(6) or
post-AIA 35 U.S.C. § 112(f), the identity of the structure(s), act(s), or
material(s) in the Accused Instrumentality that performs the claimed
function;
iv. For each claim which is alleged to have been indirectly infringed, an
identification of any direct infringement, a description of the acts of the
alleged indirect infringer that contribute to or are inducing that direct
infringement, and an identification of the bases upon which the patentee
contends the alleged infringer had knowledge of the patent asserted to be
indirectly infringed. Insofar as alleged direct infringement is based on joint
acts of multiple parties, the role of each such party in the direct
infringement must be described;
v. Whether each limitation of each asserted claim is alleged to be literally
present or present under the doctrine of equivalents in the Accused
Instrumentality;
vi. For any patent that claims priority to an earlier application, the priority date
to which each asserted claim allegedly is entitled;
vii. The date of conception and the date of reduction to practice of each
asserted claim;
viii. If a party claiming patent infringement wishes to preserve the right to rely,
for any purpose, on the assertion that its own apparatus, product, device,
process, method, act, or other instrumentality practices the claimed
invention, the party shall identify, separately for each asserted claim, each
such apparatus, product, device, process, method, act, or other
instrumentality that incorporates or reflects that particular claim; and
ix. If a party claiming patent infringement alleges willful infringement, the
basis for such allegation.
b) Document Production Accompanying Initial Disclosure of Infringement
Contentions
With the Initial Disclosure of Infringement Contentions, the party claiming patent
infringement shall produce to each allegedly infringing party or make available for inspection
and copying all documents relating to:
i. Any offers to sell or efforts to market each claimed invention prior to the
date of the application for the patent (A party’s production of a document
as required herein shall not constitute an admission that such document
evidences or is prior art under 35 U.S.C. § 102);
ii. The standing of the party alleging infringement with respect to each patent
upon which such allegations are based; and
iii. A copy of the file history for each patent in suit.
c) Initial Disclosure of Invalidity Contentions in Defense of Infringement Claims
Fifty-six (56) days from the date of the Scheduling Order, each party opposing a claim
of patent infringement shall serve on all parties its Invalidity Contentions, which shall
contain the following information:
i. The identity of each item of prior art that allegedly anticipates each
asserted claim or renders it obvious. Each prior art patent shall be
identified by its number, country of origin, and date of issue. Each prior
art publication shall be identified by its title, date of publication, and where
feasible, author and publisher. Prior art under 35 U.S.C. § 102(b) shall be
identified by specifying the item offered for sale or publicly used or known,
the date the offer or use took place or the information became known, and
the identity of the person or entity which made the use or which made and
received the offer, or the person or entity which made the information
known or to whom it was made known. Prior art under 35 U.S.C. § 102(f)
shall be identified by providing the name of the person(s) from whom and
the circumstances under which the invention or any part of it was derived.
Prior art under 35 U.S.C. § 102(g) shall be identified by providing the
identities of the person(s) or entities involved in and the circumstances
surrounding the making of the invention before the patent applicant(s);
ii. Whether each item of prior art anticipates each asserted claim or renders it
obvious. If obviousness is alleged, an explanation of why the prior art
renders the asserted claim obvious, including an identification of any
combinations of prior art showing obviousness;
iii. A chart identifying where specifically in each alleged item of prior art each
limitation of each asserted claim is found, including for each limitation that
such party contends is governed by pre-AIA 35 U.S.C. § 112(6) or post-AIA 35 U.S.C. § 112(f), the identity of the structure(s), act(s), or material(s)
in each item of prior art that performs the claimed function;
iv. Any grounds of invalidity based on 35 U.S.C. § 101, indefiniteness under
pre-AIA 35 U.S.C. § 112(2) or post-AIA 35 U.S.C. § 112(b), or enablement
or written description under pre-AIA 35 U.S.C. § 112(1) or post-AIA 35
U.S.C. § 112(a) of any of the asserted claims. This identification must be
as specific as possible. For example, each party asserting an enablement
defense must set forth with particularity what is lacking in the specification
to enable one skilled in the art to make or use the invention, specifically
citing information or materials obtained in discovery to the extent feasible.
Each party asserting an enablement defense must set forth with
355)
particularity what is lacking in the specification to enable one skilled in the
art to make or use the invention; and
v. If the claimant has alleged willful infringement, the date and a document
reference number for each opinion of counsel upon which the party relies
to support a defense to the willfulness allegation, including, but not limited
to, issues of validity and infringement of any patent in suit.
d) Document Production Accompanying Initial Disclosure of Invalidity Contentions
With the Initial Disclosure of Invalidity Contentions, the party opposing a claim of
patent infringement shall produce or make available for inspection and copying a copy of
any prior art identified in the Initial Disclosure of Invalidity Contentions that does not
appear in the file history of the patent(s) at issue. To the extent any such item is not in
English, an English translation of the portion(s) relied upon shall be produced.
Provenance
- Source
- www.mdd.uscourts.gov
- Retrieved
- 2026-09-18
- Edition
- fed-district-2026-09-18
- Content hash
1673b70b1099b7627874d8ea255319060a109d8a2f16ef53dbf21ef2ac7c0f60
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