Wikipedia (Albert C. Geyser), 2026-10-08 (Investigator, STEP I)

Site: https://en.wikipedia.org/wiki/Albert_C._Geyser (raw wikitext saved with curl: research/pages/wp-geyser.txt). Found by Google query "Albert C. Geyser" Cornell x-ray tube contact burns. Result: positive (related work and the opposing party in claim 2).

• Geyser (1865 - 5 March 1940; obituary Brooklyn Daily Eagle, 6 Mar 1940, p.15) is "known for creating the Cornell Tube in 1905". The Cornell tube "was made of heavy lead glass through which no X-rays were thought to be emitted and was thought to eliminate the danger of burning". Geyser "claimed that the lead filtration would eliminate all unsafe radiation". [web]
• Wikipedia's account of Geyser's later Tricho system (x-ray hair removal sold through salons from the 1920s; criticized by the AMA in 1925; associated with keratoses and cancers in clients) is his later history. [web] It bears on how much weight his own "about 5000 contact applications without a burn" (as reported by Tousey [read]) can carry, but that weighing is for the reviewers.
• Bearing on claim 2: Wikipedia dates the Cornell tube to 1905, and Tousey's US tube patent was filed in 1911 (see 2026-10-08-google-patents.md). The book says the Cornell tube was "made subsequently" and copies "all the essential features of the Tousey tube" [read: deep read section 11]. The two priority accounts conflict on the record so far; Tousey's earlier (pre-1911) published description of his tube, if any, would settle it. Both men are interested parties.