Where does Houghton Mifflin Harcourt Publishing Company rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Houghton Mifflin Harcourt Publishing Company ranks #18,731 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Houghton Mifflin Harcourt Publishing Company hold?

Houghton Mifflin Harcourt Publishing Company holds 15 US utility patents granted between 2015 and 2020, spanning 2 technology areas.

What is Houghton Mifflin Harcourt Publishing Company's Innovation Score?

Houghton Mifflin Harcourt Publishing Company has an Innovation Score of 25.9 out of 100 (19th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Houghton Mifflin Harcourt Publishing Company's patent grant rate increasing or decreasing?

Houghton Mifflin Harcourt Publishing Company's recent grant velocity is -93% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for Houghton Mifflin Harcourt Publishing Company's patents?

Houghton Mifflin Harcourt Publishing Company's patents average 18.9 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

USPTO 2015–2025 USPTO PatentsView US Corporation

Houghton Mifflin Harcourt Publishing Company

Q: What technology areas does Houghton Mifflin Harcourt Publishing Company focus on?

Houghton Mifflin Harcourt Publishing Company's top technology area is G09B (Educational OR Demonstration APPLIANCES; Appliances FOR Teaching, OR Communicating With, THE Blind, Deaf OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; Diagrams) with 15 patents, ranking #48 of 1,127 assignees active in that subclass. Grants appear in 2 CPC subclasses total.

Q: How is the Houghton Mifflin Harcourt Publishing Company patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

USPTO PatentsView assignee record - 15 granted patents across 2 technology areas, recorded in grant years 2015–2020. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: G09B (Educational OR Demonstration APPLIANCES; Appliances FOR Teaching, OR Communicating With, THE Blind, Deaf OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; Diagrams).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Houghton ranks #18,731 of 49,997 tracked US assignees by granted-patent volume, with 15 patents across 2 technology areas.

#18,731
of 49,997 US assignees by volume: 19th percentile
by Innovation Score (25.9/100): 18.9
avg claims per patent: -93%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R18731 · US Corporation #18,731 · 15 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-RICH · TYPE-USCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 15 grants
MID-PACK #18,731/49,997
PHOTO-FINISH Hong Kong Ivps…
CPC-NARROW G09B · 2 areas
INNOV-THIN 25.9/100
CLAIMS-RICH 18.9 claims/avg
TYPE-USCORP US Corporation
VEL-DROP -93% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Hong Kong Ivps International Limited (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Houghton’s 25.9 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 9.6 pts (37%) Velocity 0.0 pts (0%) Breadth 5.0 pts (19%) Claim depth 11.4 pts (44%)

Qualcomm Incorporated · highest

85
Houghton Mifflin… · this assignee

26
3D Lighting… · lowest

7

What this shows Houghton's Innovation Score is 25.9/100 (19th percentile of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Houghton?

Each dot is one of Houghton’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Houghton’s own 18.9 claims/patent is ABOVE the 16.9 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

Houghton vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where Houghton's grants concentrate

Houghton Mifflin Harcourt Publishing Company is a focused PatentsView assignee: 2 CPC subclasses with 100% of grants classified under G09B (Educational OR Demonstration APPLIANCES; Appliances FOR Teaching, OR Communicating With, THE Blind, Deaf OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; Diagrams). Peak complete grant year is 2016 (6 grants) versus a trough of 1 in 2020. By volume, Houghton sits between Hong Kong Ivps International Limited and Hydro International Ltd.

Hong Kong Ivps In…

15
Hongene Biotech

15
Hoshizaki America

15
Hospital for Spec…

15
House of Design

15
Hubbardton Forge

15
Hunting Energy Se…

15
Hydro Internation…

15
Houghton Mifflin… ◀

15

What this shows Houghton holds 15 patents at rank #18,735, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Houghton

By rank, the assignees closest to #18,735 in granted patent volume.

Leaders in G09B (Educational OR Demonstration Appliances)

Other assignees with the most granted patents in Houghton's primary technology class.

Houghton's Innovation Score vs. every tracked assignee

Composite of portfolio volume, grant velocity, technology breadth, and claim depth (0–100)

26 19th percentile higher than 19% of 49,997 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2015–2020

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Houghton Mifflin Harcourt Publishing Company patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	3	20.0%
2016	6	40.0%
2017	3	20.0%
2018	2	13.3%
2020	1	6.7%

Which technologies does Houghton Mifflin Harcourt Publishing Company patent most?

G09B - Educational OR Demonstration APPLIANCES; Appliances FOR Teaching, OR Communicating With, THE Blind, Deaf OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; Diagrams 15

G06Q - Information AND Communication Technology [ICT] Specially Adapted FOR Administrative, Commercial, Financial, Managerial OR Supervisory PURPOSES; Systems OR Methods Specially Adapted FOR Administrative, Commercial, Financial, Managerial OR Supervisory Purposes, NOT Otherwise Provided FOR 8

Top 2 of 2 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Houghton Mifflin Harcourt Publishing Company's patent record in context - here's where to go next.

Houghton Mifflin Harcourt Publishing Company's lead technology class is G09B (Educational OR Demonstration APPLIANCES; Appliances FOR Teaching, OR Communicating With, THE Blind, Deaf OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; Diagrams), 100% of its portfolio - see every assignee active in that class. Explore G09B
Ranked #18,731 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Houghton Mifflin Harcourt Publishing Company against Hong Kong Ivps International Limited, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 25.9/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled by PlainPatent, US Patent Intelligence Editorial Process · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.