Sites tried and blocked (2026-10-03)
Each site below was tried from this environment and refused automated access. Retry on the next run, or use a browser session (Claude in Chrome), which may get through where scripted requests do not. General note: the WebSearch tool was out of quota for this whole session ("200 of 200 WebSearch calls"). Every search was therefore run against each site's own search endpoint, as recorded in the per-site notes.
| Site | URL tried | What was wanted | Response |
|---|---|---|---|
| Google Patents | https://patents.google.com/xhr/query?url=inventor%3DKassner%26before%3Dpriority%3A19450101%26after%3Dpriority%3A19250101; https://patents.google.com/patent/US2089966A/en |
Kassner inventor search 1925-1945; family members, "Cited by" lists for US 2,089,966 (forward citations show later work by others) | "We're sorry... automated queries" page; HTTP 503 |
| Espacenet (EPO) | https://worldwide.espacenet.com/3.2/rest-services/search?q=in%3D%22Kassner%22%20and%20pd%3C1950; .../publicationDetails/biblio?CC=GB&NR=417501A |
INPADOC families of GB417501, GB448417-9, GB448418 full text, DE priority applications (9 Dec 1931, 9 Mar 1931, 31 Aug 1933), CH and FR members | empty body; HTTP 403 |
| e-newspaperarchives.ch (Swiss newspapers) | https://www.e-newspaperarchives.ch/ |
Swiss newspapers 1932-1953 on Ternion, Dipol, Kassner, Vibranic | HTTP 403 |
| HathiTrust full-text search | https://babel.hathitrust.org/cgi/ls?q1=Kassner%20Ternion&anyall1=phrase |
Full-text search of trade journals (Chemical Abstracts 1935, Wireless World, Electronics) | HTTP 403 |
| FreePatentsOnline | https://www.freepatentsonline.com/2089966.html |
Text and cited-by list of US 2,089,966 | HTTP 403 |
| Google patent images | https://patentimages.storage.googleapis.com/ |
Patent PDFs | HTTP 403 (the USPTO image server was used instead) |
| CourtListener opinion pages and API | https://www.courtlistener.com/opinion/226141/in-re-arnold/; /api/rest/v4/opinions/226141/ |
Opinion text | empty page; "Authentication credentials were not provided" (the search API worked, and the opinions were read from static.case.law instead) |
| DEPATISnet (German Patent Office) | https://depatisnet.dpma.de/DepatisNet/depatisnet?action=bibdat&docid=GB000000417501A |
German priority documents and bibliographic data | HTTP 302 redirect to a session page; not followed further this run |
Queries are listed in the URLs. None of these sites returned any content, so none is recorded as negative.