DEPATISnet (German Patent and Trade Mark Office), run 3, 2026-10-04

Site: https://depatisnet.dpma.de (bibliographic pages ?action=bibdat&docid=...; page images in the built-in viewer ?action=pdf&docid=...&pdfpage=N; expert search ?action=experte). Access: worked in Chrome (blocked in run 1, not retried in run 2). No CAPTCHA. Page images were read on screen; no file was downloaded (scans are image-only; a full download for OCR is left to the owner, see "Next"). Result: positive (priority 1, the inventor's own work).

Espacenet was retried first for the same documents and was again stopped by a Cloudflare "Performing security verification" page (not completed) = blocked (CAPTCHA). DEPATISnet carries the same GB and FR scans, so it replaces Espacenet for these.

Queries tried

• Bibliographic pages: GB000000448418A, GB000000435643A, FR000000786294A, FR000000788428A, DE000001128930B, DE000001128930A, DE000001063268B, FR000000746569A, GB000000409265A, GB000000417863A (the last one for the related-work note).
• Expert searches: IN=Kassner AND PUB>=01.01.1938 AND PUB<=31.12.1970 (74 hits); (IN=Kassner OR PA=Kassner OR PA=Ternion OR PA=Physikalische) AND PUB<=31.12.1937 (163 hits; a first form with PA="Elektro-Physikalische" was rejected by the parser for the hyphen).
• Page images read: FR 786,294 pp.1, 2, 15, 17 (text) and 18-20 (drawings); FR 788,428 pp.1 and 6; DE 1,128,930 B p.1; DE 1,128,930 A p.1.

Findings

1. Kassner had died by May 1962; his last patent was granted to Wilma Hencke, Munich [web]

DE 1,128,930 (Auslegeschrift 3 May 1962; Patentschrift 15 Nov 1962), "Verfahren und Vorrichtung zur Erzeugung von UHF-Resonanzdrehfeldern", file K 40449 VIIIc/21g, filed 14 Apr 1960. Both title pages read: - Auslegeschrift: "Anmelder: Wilma Hencke, geb. Unger, München 15, Haydnstr. 2" and "Ernst E. W. Kassner †, München, ist als Erfinder genannt worden". - Patentschrift: "Patentiert für: Wilma Hencke, geb. Unger, München"; same inventor line with the dagger. URL: https://depatisnet.dpma.de/DepatisNet/depatisnet?action=bibdat&docid=DE000001128930B (and ...DE000001128930A).

What this adds: the dagger (†) is the conventional mark for a deceased person [memory, high]. So E. E. W. Kassner was dead by 3 May 1962 and had lived in Munich. He filed (or the application was filed) on 14 Apr 1960, so he died between about April 1960 and May 1962 (the filing date only shows the application existed; it does not prove he was alive on that day). The file letter "K" in K 40449 suggests the application was entered under a name beginning with K (Kassner), i.e. filed in his own name and later transferred to Hencke [memory, medium on the DPA file-letter convention; not confirmed for this file]. Hencke's relation to him (heir, partner, financier) is unknown.

This partly answers "who was Kassner" and the arbiter's "record goes dark" question for the end of his life: the record ends with his death in Munich around 1960-62, and his last work (UHF rotating fields from plate resonators, for particle acceleration, plasma and fusion research) passed to a private person, not to a company. Citations in the search report: DE 1,027,745 B and DE 1,045,495 B (not yet looked up).

2. GB 448,418 found (missing from the folders) [web]

"Improvements in electric discharge devices and circuits for the generation of short electromagnetic waves, and radiating arrangements therefor". Applicant Ernst Eduard Wilhelm Kassner; GB application 25087/34, filed 31 Aug 1934; published 2 Jun 1936; German priority 31 Aug 1933; 36 pages. Abstract (DEPATISnet, from the GB abridgment): "In apparatus for treating substances by high frequency oscillations in the quasi-optical region", a discharge tube with built-in reflector sits at one focus of an ellipsoidal reflecting casing; radiation passes a lens "containing transparent dielectric fluid"; "The fluid to be treated by radiation is circulated through a tube to a glass sphere ... mounted at the second focus", and a heating coil "acts also as a high-frequency transformer by which the fluid is exposed to preliminary ionization". Bears on claim 5 (apparatus) and claim 3 (a flow-through treatment set-up for liquids). It is apparatus; the abstract gives no effect data. Same German priority as FR 786,294 and US 2,094,602, so these three are one family.

3. GB 435,643 confirmed as a divisional of GB 417,501 [web]

"An improved relay for converting light variations into electric oscillations". J. Y. Johnson for Ternion Akt.-Ges., Glarus; application 15 Dec 1933, No. 25002/34; published 16 Sep 1935. The abridgment says: "Divided out of 417,501." Two plate resonators beat against each other; one carries a light-sensitive layer (phosphorescent zinc sulphide with a little copper, sensitive to infra-red) whose dielectric constant changes with light, shifting that resonator's frequency; the beat frequency measures light intensity; a thermostat keeps the layer at constant temperature. Bears on claim 4 (plate resonators as frequency-sensitive detectors of a dielectric change) and on the Phono-Vision/electro-optical line of Kassner's work (1929 light-image microphone; 1937 Phono-Vision). That it was "divided out of" GB 417,501 means the 1932 application originally also disclosed this detector.

4. FR 786,294 read in part [web, page images pp.1-2, 15, 17-20]

"Émetteur d'ondes ultra-courtes pour agir particulièrement sur les substances dipolaires". "M. Ernst, Eduard, Wilhelm KASSNER résidant en Angleterre." Filed Paris 30 Aug 1934; granted 3 Jun 1935; published 30 Aug 1935; German application 31 Aug 1933. 38 pages (pp.1-17 text, pp.18-38 drawings, two copies of 7 plates). - p.1 states the principle in Kassner's own words: it is "established", "in conformity with Debye's dipole theory of anomalous dispersion and with numerous experimental researches carried out elsewhere", that the natural frequencies, "respectively the relaxation frequencies called 'anomalous dispersion bands'", of the biological and organic molecular structure of all the named substances lie in the quasi-optical ultra-short-wave range (my translation of p.1 col. 2 lines 49-60). - p.2: the electromagnetic oscillation energy of that wave range "interacts with the dipolar substances, whence directional effects and influences on the substances of a partly unknown kind are produced" (my translation). - pp.2-17: tube oscillators, concentric tubular tuning conductors with movable reflection bridges, push-pull multi-grid tubes; claims (p.17) are apparatus (graduated radiators, friction-roller tuning, transparent plates so light can pass through the resonator for polarimetry, a circulation system for the substance, a thermostat for the oscillator and the substances). How it bears on claim 1: in this 1933/34 text Kassner identifies his "natural frequencies" with Debye relaxation frequencies ("respectivement les fréquences de relaxation"). That is the mainstream (broad) dielectric relaxation, not a separate sharp resonance. The reviewers should compare this with GB 417,501's separation of a broad "friction" dispersion from a "hitherto unknown" sharp resonance dispersion.

5. NEW: FR 788,428, the French member of the "energy content" patent [web, page images pp.1, 6]

"Procédé de polarisation diélectrique par résonance moléculaire électrique de substances dites « dipôles »" (process of dielectric polarisation by electrical molecular resonance of so-called dipole substances). "Ernst Edward Wilhelm KASSNER résidant en Angleterre." Filed Paris 27 Sep 1934; granted 29 Jul 1935; published 10 Oct 1935; 10 pages; no foreign priority claimed. It was not in either folder or in any earlier run's list. - p.1: the invention aims at modifications, permanent or not, of the "teneur d'énergie" (energy content) of dipole substances by exposing them to rapidly oscillating fields; "dipôle" is meant "dans le sens qui lui est attribué dans l'ouvrage connu de Debye"; a rise in temperature "ne constitue pas un objet de la présente invention" though it may occur as a secondary effect; the first of the natural frequencies is "La fréquence propre donnée par le temps de relaxation pour l'orientation des dipôles". This again ties the first natural frequency to Debye relaxation. - p.6 carries the same examples as GB 417,501: gold sol red to orange then coagulation after two hours; agar at 116 cm and 10 W thinner after 10 minutes then more viscous; 2 litres of fresh cow's milk 2 minutes at each of 5 wavelengths starting at 455 cm; veal at 362 cm/150 W, 184 cm/10 W, 92.5 cm/3.0 W, temperature 20 to 24.5 C, "se conservait fraîche pendant plus de 15 jours" and longer with 5 minutes per hour of intermittent re-exposure at 3 W total; 2 litres apple juice 1.5 minutes at 475 cm/200 W, 354 cm/150 W, 145 cm/15 W, 45 cm/1.2 W, 22 to 24.5 C, no fermentation after four months in a closed vessel; section C on living organisms: sera have characteristic frequencies, one "approximativement à la longueur d'onde de 90 cm". - Not yet read: pp.2-5 and 7-10 (theory, remaining examples, résumé). A full reading would show whether the French text differs from GB 417,501 anywhere (for example the water value, 1.28 or 1.5 cm). Note: GB 417,501's veal is "2 weeks"; the French text reads "plus de 15 jours".

6. Other DEPATISnet hits (identity checked or open)

• Kassner family members listed by DEPATISnet, not previously noted: ES 135,727 ("Un procedimiento para alterar el contenido de energía de una sustancia dipolar", Spanish member of the energy-content patent), ES 125,879 (applicator), ES 113,192 (light-image microphone), ES 111,807 ("procedimiento para hacer visibles las oscilaciones electromagnéticas"), DK 47,803 C (already known).
• Pre-1938 Kassner-name hits not yet identified with E. E. W. Kassner: GB 357,534 / FR 697,547 (chemical reactions by a direct-current glow discharge), FR 693,641 (gas syntheses), GB 262,829 / FR 626,217 (gas with excess positive or negative ions), GB 302,585 (condenser charging for cathode-ray oscillographs), GB 340,964 / FR 678,190 (electro-optical light-image microphones; Elektro-Physikalische Gesellschaft family, known), GB 362,385 / 355,953 and FR 701,248 / 701,637 (plug connectors), FR 822,220 and DE 686,126 (sound scarecrow), ES 38,220. Their inventors/applicants were not opened, except:
• Different people (closed): FR 746,569 is Franz Emanuel Bernhard Kassner (medical galvanic currents, 1932); DE 1,063,268 and related synchronous-motor/frequency-converter patents are Paul Emil Fritz Kassner (Philips, 1956); GB 409,265 and other "Physikalische" hits are the Institut für physikalische Grundlagen der Medizin (Frankfurt).
• 1938-1970 search: the only E. E. W. Kassner documents are US 2,109,843, US 2,104,697, US 2,558,568, DE 661,695 and DE 1,128,930 (A and B). No other post-war Kassner filing was found under that name.

How this bears on the claims

Next

• Owner: download the full scans of FR 788,428 (10 pp.), FR 786,294 (38 pp.), GB 448,418 (36 pp.), GB 435,643 (7 pp.), ES 135,727 and DE 1,128,930 from DEPATISnet for OCR and a deep read (not done here: the Investigator did not download files without the owner's approval).
• Munich death register (Standesamt München, about 1960-62) and Munich address books for Kassner and Hencke (Haydnstraße 2); DPMA file K 40449 (transfer to Hencke).
• Check identity of the 1925-1931 Kassner chemistry and glow-discharge patents (GB 357,534, FR 693,641, GB 262,829).