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Patent holder profile

Osbourn Dorsey and the door-holding device record

Dorsey's door-holding device belongs in a public-buildings and access-tools lane, but CultureUp keeps it noindex and refuses the doorknob myth shorthand.

Why this belongs on CultureUp

Dorsey is a public-record memory story.

This belongs on CultureUp because the patent record connects invention to place, public institutions, work systems, laboratories, employers, federal or corporate assignment, and the limits of public records.

Sprint 8 priority 2 / not final rankStatus: noindex_draftSource grade: B+

Patent: 210764: Improvement in Door-Holding Devices
Issue date: 1878-12-10
Place: Washington, District of Columbia
Record strength: Patent-record facts are attached, but the strongest public claim remains under source review.
Identity evidence: Public context source attached where available; CultureUp does not use the patent row alone as race, ancestry, lineage, or Indigenous Black identity proof.
Sprint priority: 2 / not final rank
Cluster: Doors, security, and public buildings
Myth-resistance note: Do not say Dorsey invented the doorknob. The reviewed patent row is for a door-holding device.
Needed before promotion: Resolve identity evidence and technical title limits before any indexable route promotion.
Why this record matters: The record can support a doorway and public-building tool story without repeating unsourced claims that Dorsey invented the doorknob.

What the public record supports

U.S. Patent No. 210764, issued December 10, 1878.
Washington, District of Columbia, as recorded place.
A door-holding device, not a complete doorknob invention claim.

What remains open

Public identity evidence before indexable promotion.
Exact technical comparison to knobs, latches, stops, and door holders.
Public-building or trade-use context beyond the patent row.

Article profile

Read the person, place, invention, and record separately.

CultureUp keeps each layer visible so a patent record does not get stretched into claims the source trail cannot support.

The patent record

210764 was issued on 1878-12-10 for Improvement in Door-Holding Devices.

The person in the record

The attached public context sources support a reader-facing profile frame. Any deeper life history, family record, school record, employment file, or community memory needs its own source trail.

Place attached to the claim

Washington, District of Columbia is the public place anchor used for this route. CultureUp does not infer local family continuity from the patent row alone.

The invention

The invention is summarized from the public patent title and source trail. Technical, market, institutional, and adoption claims stay limited to what the attached sources can support.

Business, labor, and use

Modern patent records often separate inventor, employer, assignee, licensee, and beneficiary. CultureUp keeps those categories apart instead of treating a patent as proof of ownership, wealth, adoption, or public impact.

What the record cannot prove

The patent record does not by itself prove full biography, race, ancestry, Indigenous Black identity, commercialization, institutional adoption, economic benefit, modern product lineage, or community memory.

Identity and correction note

CultureUp treats this as Black American patent memory only through public, reviewable sources. The page does not certify ancestry, descent, tribe, nationality, family history, or private identity.

Send stronger patent images, assignment records, employer records, licensing documents, public biographies, or source corrections through CultureUp's correction path.

Patent records do not prove final rank, private identity, solo credit when co-inventors appear, employment ownership, commercialization, adoption, or later public impact.

Noindex,follow until the source-review blocker is resolved.

Employer, assignee, and inventor status are not interchangeable. CultureUp names assignees when the patent record does.

Do not use this page to make absolute first, ownership, adoption, or commercialization claims without a separate source trail.

Patent records

Grant trail

Grant rank and unique-holder rank are shown separately so repeat patentees do not distort the chronological sequence.

identity_reviewSprint priority 2Not public rankutility patentunder review

210764: Improvement in Door-Holding Devices

Osbourn Dorsey / 1878-12-10

Sprint 8 myth-resistance record. Use the patent title, door-holding device, not a broad doorknob claim.

Residence: Washington, District of Columbia
Category: doors / public-building safety
Source status: under review
Chronology handling: identity_review
Cluster: Doors, security, and public buildings
Myth-resistance note: Do not say Dorsey invented the doorknob. The source-supported title is Improvement in Door-Holding Devices.
Primary sources: 1 mapped

Source trail

Claims stay tied to source limits.

Myth-resistance and source limits

Sources that keep patent folklore from becoming headline claims before exact title, number, date, identity, and source-limit evidence supports it.

patent text mirrorpatent text with myth-resistance review

US210764A - Improvement in Door-Holding Devices

Google Patents / 1878 patent record

Supports: Shows Osbourn Dorsey of Washington, District of Columbia, connected to an improvement in door-holding devices published December 10, 1878.
Limit: The patent title supports door-holding-device language, not a broad doorknob claim. Patent records do not by themselves prove full race/identity, ancestry, biography, commercialization, public memory, economic benefit, or personal ownership.
Last checked: 2026-06-10
Source URL: https://patents.google.com/patent/US210764A/en