Invalidity dossier
US 4761047
Added 9/23/2026, 3:30:57 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 4,761,047 A
Title: "Light rays radiation cloth for medical treatment"
Patent number / application: US 4,761,047 A; Application US06/934,226.
Inventor / assignee: Inventor Kei Mori. Original assignee and current assignee both listed as "Individual" (Google Patents notes listed assignees may be inaccurate and that no assignee analysis was performed). No other assignee or ownership information is supplied.
Dates (as supplied): Prior art date 1986-01-13; filing date 1986-11-20; publication/grant date 1988-08-02; anticipated expiration 2006-11-20. Legal status shown as "Expired - Fee Related."
Purpose: To administer medical treatment, beauty treatment, or health promotion by radiating light energy corresponding to the visible-light component of solar rays onto a diseased part of a patient or onto skin. The text states visible light rays "not containing ultraviolet and infrared rays" promote a living-body reaction, help prevent skin aging, and help relieve pain from arthritis, neuralgia, bedsores, rheumatism, injuries, and bone fractures — benefits described as experienced and substantiated by the applicant.
Plain-language scope: A flexible cloth (textile, knitted, or non-woven basic sheet plate) carrying many optical fibers on one surface, fed by a light connector, optionally via an optical conductor cable from a solar collecting/transmitting device. Light is emitted from midway points along the fibers using various emitters — a depression in the core with a dispersing body, a transparent body bonded where cladding was removed, a notch, or a transparent substance of differing refractive index. Fibers may cross lengthwise and laterally, with the basic sheet plate omitted for lighter weight and improved flexibility. Other embodiments sandwich parallel fibers between a flexible base sheet and a transparent flexible sheet, using adhesives (e.g., optical paste), a titanium-oxide reflecting/dispersing membrane, positioning grooves, and reflecting plates or processed fiber ends to return unused light. The cloth can form waist-, arm-, leg-, or head-bands, line footwear or containers (e.g., capsules), or be mounted in clothing (shawl, vest, bathrobe, poncho).
Source: https://patents.google.com/patent/US4761047/en
What the excerpt does not establish: Claim language is not included in the supplied text, so the precise metes and bounds of the claims are unknown. No detailed description beyond the passages shown, no drawings content, no examples, no figures, and no specific cited prior-art references are provided. Assignee accuracy, legal status conclusions, and any litigation, ownership transfer, validity, or prior-art analysis are outside the supplied material.
Generated 10/1/2026, 9:51:32 PM
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Litigation summary
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PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.