Two thirds of U.S. states have some sort of law addressing bad faith assertions of patent infringement. The map and table below are current as 05/01/2019. See this post for more on some of the different types of state patent laws.
States Acting Against Bad Faith Patent Infringement Assertions (current as of 05/01/2019)
(mouse over the state to see what action its legislature has taken)

How to embed the interactive map on your web page
To embed the interactive map on your own web page, copy the code below:
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The map will always show the most up-to-date version.
Summary by State (current as of 05/01/2019)
State | Bill | Status |
---|---|---|
Alabama | Ala. Code § 8-12A | Signed into law |
Arizona | H.B. 2386 | Signed into law |
California | S.B. 681 | Stalled |
Colorado | Colo. Rev. Stat. § 6-12-101 | Signed into law |
Connecticut | S.B. 258 | Considered in 2014 session; not reintroduced. |
Florida | Flor. Stat. § 501.991 | Signed into law |
Georgia | Ga. Stat. § 10-1-27A | Signed into law |
Idaho | S.B. 1354 | Signed into law |
Illinois | S.B. 3405 | Signed into law |
Indiana | H.B. 1102 | Signed into law |
Iowa | S.S.B. 1028 | Introduced in Iowa Senate in previous session. No action since 2015. |
Kansas | S.B. 38 | Signed into law |
Kentucky | H.B. 190 | Introduced in KY House in previous session. No action since 2016. |
Louisiana | S.B. 255 | Signed into law |
Maine | S.P. 654 | Signed into law |
Maryland | S.B. 585 | Signed into law |
Massachusetts | S. 159 | Reintroduced in 2019 after 2018 veto. Hearings held. |
Michigan | S.B. 289 | Signed into law |
Minnesota | S.F. 1321 | Signed into law |
Mississippi | H.B. 589 | Signed into law |
Missouri | S.B. 706 | Signed into law |
Montana | SB 39 | Signed into law |
Nebraska | L.B. 677 | Considered in previous session. No action since 2014. |
New Hampshire | S.B. 303 | Signed into law |
New Jersey | S. 2189 | Introduced in NJ Senate in 2018. |
North Carolina | S.B. 648 | Signed into law |
North Dakota | HB 1163 | Signed into law |
Ohio | H.B. 194 | Considered in previous session. No action since 2015. |
Oklahoma | H.B. 2837 | Signed into law |
Oregon | S.B. 1540 | Signed into law |
Pennsylvania | H.B. 1775 | Introduced in 2018 in the House. Not yet reintroduced in 2019 session. |
Rhode Island | H.B. 7425 | Signed into law |
South Carolina | H. 3682 | Signed into law |
South Dakota | S.B. 143 | Signed into law |
Tennessee | H.B. 2117 | Signed into law |
Texas | SB 1457 | Signed into law |
Utah | Utah H.B. 117 | Signed into law |
Vermont | Vermont's Act 44 | Signed into law |
Virginia | H.B. 375 | Signed into law |
Washington | SB 5059 | Signed into law |
Wisconsin | S.B. 498 (Act 339) | Signed into law |
Wyoming | S.F. 65 | Signed into law |