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Krohn; Holger Patent Filings

Krohn; Holger

Patent Applications and Registrations

Patent applications and USPTO patent grants for Krohn; Holger.The latest application filed is for "method and device for producing respiratory air which is harmless to health in positive pressure nasal breathing apparatus".

Company Profile
0.4.0
  • Krohn; Holger - 97816 Lohr DE
  • Krohn; Holger - Mulheim DE
  • Krohn; Holger - Lohr-Wombach DE
*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.
Patent Activity
PatentDate
Method and device for producing respiratory air which is harmless to health in positive pressure nasal breathing apparatus
Grant 6,332,462 - Krohn December 25, 2
2001-12-25
Method of electrically measuring the concentration of acids
Grant 4,988,418 - Beck , et al. January 29, 1
1991-01-29
Four-quadrant current-regulated energization of D.C. motor using pulse-width modulation
Grant 4,146,827 - Krohn March 27, 1
1979-03-27
Duplicating method and arrangement
Grant 4,064,446 - Krohn December 20, 1
1977-12-20

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