The originals

Letters, test reports and press articles from the archive. One click enlarges the document. The highlighter marks the key passages, with a short explanation beside them. Each document shows the position as of its date.

Press and public sources

Who reported on it

EXPO 2000 HannoverProjekt „Hochleistungsfilter: Filtern statt Öl wechseln“, Thema Umwelt. Eines von 280 „Weltweiten Projekten“ in Deutschland. Offizieller Eintrag
Main-Post, 26 May 2000Report on the EDEKA trucks in Gochsheim and the inventor, by Roland Lörzer.
Hamburger Abendblatt, 11.01.2000Pinneberger Zeitung, S. 3: sechs PVG-Busse, über 2 Mio. km. Der Hersteller zitiert den Artikel auf seiner Seite. Archivseite
ACKER+plus, November 2010Fachbericht „Mit Feinstfilterung gegen den (Ölwechsel-)Strom“ über drei Landwirtschaftsbetriebe, darunter das Lohnunternehmen Gebr. Schweizer. Heft ansehen (PDF) · Die Aussagen im Überblick
changeX, 5 January 2001Portrait “I want to free Germany from waste oil”. To the article
NABU “Naturschutz heute” 2/99Full-page environmental tip in the members’ magazine, according to the manufacturer’s notice of 14 May 1999. Archive page
BR, Franz GernstlA team around Franz Gernstl met Hermann Trabold in 1998. Repeated in “Gernstls Zeitreisen” and “Bayern erleben”. Episode guide
MDR “Einfach Genial”, 2001According to the manufacturer, Hermann Trabold received the 1st “Einfach Genial” prize from MDR for his fine oil filter. The year comes from the partner site. Archive page · Partner site

Patents

Two patents, several countries

The inventor and holder was Hermann Trabold. You can read every patent document online.

Document	Content	Date
DE 38 42 017 C2	Oil filter for combustion engines	24.01.1991
US 5,178,753	same invention, USA	12.01.1993
DE 40 30 304 C2	Filter for filtering gaseous and liquid media	27.10.1994
EP 0 503 028 B1	same invention, Europe	14.12.1994
US 5,556,543	same invention, USA	17.09.1996

The types of source

Original
Scan of the document from the archive.
Manufacturer
Statement by Trabold Filter GmbH.
Partner site
Reproduced by a sales partner.
Press
Report by a newspaper or broadcaster.

Read for yourself

The pages in the Internet Archive

Since 1998 the Internet Archive has saved the manufacturer’s website again and again. From here you go straight to the originals.