Where does Charles Buist, DMD, PA rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Charles Buist, DMD, PA ranks #39,414 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 Charles Buist, DMD, PA hold?

Charles Buist, DMD, PA holds 6 US utility patents granted between 2020 and 2023, spanning 2 technology areas.

What is Charles Buist, DMD, PA's Innovation Score?

Charles Buist, DMD, PA has an Innovation Score of 21.2 out of 100 (8th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Charles Buist, DMD, PA focus on?

Charles Buist, DMD, PA's top technology area is A61C (DENTISTRY; Apparatus OR Methods FOR Oral OR Dental Hygiene) with 4 patents, ranking #222 of 546 assignees active in that subclass. Grants appear in 2 CPC subclasses total.

Is Charles Buist, DMD, PA's patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Charles Buist, DMD, PA.

What does claim depth mean for Charles Buist, DMD, PA's patents?

Charles Buist, DMD, PA's patents average 13.5 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.

How is the Charles Buist, DMD, PA 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 2015–2025 USPTO PatentsView US Corporation

Charles Buist, DMD, PA

USPTO PatentsView assignee record - 6 granted patents across 2 technology areas, recorded in grant years 2020–2023. 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: A61C (DENTISTRY; Apparatus OR Methods FOR Oral OR Dental Hygiene).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Charles ranks #39,414 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 2 technology areas.

#39,414
of 49,997 US assignees by volume: 8th percentile
by Innovation Score (21.2/100): 13.5
avg claims per patent

USPTO PatentsView assignee plate

Corpus R39414 · US Corporation #39,414 · 6 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-RICH · TYPE-USCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 6 grants
LOWER-Q #39,414/49,997
PHOTO-FINISH Changchun University…
CPC-NARROW A61C · 2 areas
INNOV-THIN 21.2/100
CLAIMS-RICH 13.5 claims/avg
TYPE-USCORP US Corporation
SPAN-YRS 2020–2023 · 4y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Changchun University of Science and Technology (±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 Charles’s 21.2 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 6.7 pts (32%) Velocity 1.3 pts (6%) Breadth 5.0 pts (24%) Claim depth 8.1 pts (38%)

Qualcomm Incorporated · highest

85
Charles Buist DMD PA · this assignee

21
3D Lighting… · lowest

7

What this shows Charles's Innovation Score is 21.2/100 (8th 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 Charles?

Each dot is one of Charles’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). Charles’s own 13.5 claims/patent is ABOVE the 9.0 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Charles's grants concentrate

Charles Buist, DMD, PA is a focused PatentsView assignee: 2 CPC subclasses with 66.7% of grants classified under A61C (DENTISTRY; Apparatus OR Methods FOR Oral OR Dental Hygiene). Peak complete grant year is 2020 (5 grants) versus a trough of 1 in 2023. By volume, Charles sits between Changchun University of Science and Technology and ChemFree Corporation.

Charles's three-year grant acceleration

Charles Buist, DMD, PA shows 1 grants in 2022–2024 against only 5 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Changchun Univers…

6
Changjiang River…

6
Changzhou Huada K…

6
Charis & Doxa

6
Charm Alarm

6
Chase

6
Cheray

6
Chemfree

6
Charles Buist DMD… ◀

6

What this shows Charles holds 6 patents at rank #39,541, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Charles

By rank, the assignees closest to #39,541 in granted patent volume.

Leaders in A61C (Dentistry)

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

Charles's Innovation Score vs. every tracked assignee

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

21 8th percentile higher than 8% 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 · 2020–2023

Grants by year

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

View data table

Charles Buist, DMD, PA patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	5	83.3%
2023	1	16.7%

Which technologies does Charles Buist, DMD, PA patent most?

A61C - DENTISTRY; Apparatus OR Methods FOR Oral OR Dental Hygiene 4

A61B - DIAGNOSIS; SURGERY; Identification 2

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

Charles Buist, DMD, PA's patent record in context - here's where to go next.

Charles Buist, DMD, PA's lead technology class is A61C (DENTISTRY; Apparatus OR Methods FOR Oral OR Dental Hygiene), 66.7% of its portfolio - see every assignee active in that class. Explore A61C
Ranked #39,414 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Charles Buist, DMD, PA against Changchun University of Science and Technology, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 21.2/100 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.