Ralph M. Hoffmann — 15 Patents at Compression Technologies

Ralph M. Hoffmann has been granted 15 US patents while listed as an inventor at Compression Technologies. The first was granted in 1981 and the most recent in March 2017. Ralph M. Hoffmann ranks #307,048 of 4,157,543 US inventors in our database (top 7.4%). Patent records list Ralph M. Hoffmann in Grabow, MN, DE.

Issued Patents All Time

Showing 1–15 of 15 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
9605472	Connecting means comprising a hatch and a bellows	Stefan Ebeling, Jens Gärtner, Andreas Kohler, Raj Kotian	2017-03-28
9306331	Self-aligning connector for data and/or power transmission	Roland Lange, Stefan Ebeling, Jens Gärtner, Andreas Kohler, Raj Kotian	2016-04-05
5046932	Rotary epitrochoidal compressor	—	1991-09-10	$100,000
4911043	Apparatus and method for milling a trochoidal rotor	—	1990-03-27	$16,000
4895222	Constant level oiler	—	1990-01-23
4884661	Center-fill top cover for oilers	—	1989-12-05
4827983	Swiveling mount for the outlet of a pressure vessel	—	1989-05-09	$35,000
4778362	Outer envelope trochoidal rotary device having a two piece rotor assembly	—	1988-10-18	$27,000
4735560	Seal assembly for a rotary device	Larry Wydra	1988-04-05
4728270	Apparatus and method for replacing apex seals in a rotary device	—	1988-03-01
4721445	Outer envelope trochoidal rotary device having a rotor assembly having peripheral reliefs	—	1988-01-26	$39,000
4551083	Dual rotor gear assembly for trochoidal rotary device	—	1985-11-05
4400145	Driveshaft arrangement for a rotary expansible chamber device	—	1983-08-23
4382755	Driveshaft arrangement for trochoidal rotary device	—	1983-05-10
4297090	Rotary expansion power unit with valve disc connected to crankshaft	—	1981-10-27

Ralph M. Hoffmann — 15 Patents

Issued Patents All Time

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