Hazemeijer B.V.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01H ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES 193

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE32116 Electrical vacuum switch having means for generating an axial magnetic field between the contact facesDec 02, 83Apr 15, 86[H01H]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4628393 Method for switching in a three-phase high voltage circuitExpiredMar 11, 82Dec 09, 86[H02H]
4590547 Active full-wave rectifier detector circuitExpiredSep 27, 84May 20, 86[H02M]
4585911 Spring charged operating device for switchExpiredFeb 15, 84Apr 29, 86[H01H]
4562320 Current-limiting deviceExpiredDec 15, 80Dec 31, 85[H01H]
4527026 Device for moving an element between two end positions by means of an energy bufferExpiredOct 24, 83Jul 02, 85[H01H]
4436241 Metal-ceramic jointExpiredJun 14, 82Mar 13, 84[C04B, B23K]
4354215 Selective safety device for the protection of a power distribution systemExpiredJun 11, 80Oct 12, 82[H02H]
4331850 Vacuum switch including a getter deviceExpiredNov 29, 79May 25, 82[H01H]
4323590 Method for improving switch contacts, in particular for vacuum switchesExpiredJul 21, 80Apr 06, 82[B05D]
4319210 Current limiting switch capable of rapid circuit breakingExpiredMay 19, 80Mar 09, 82[H01H]
4293813 Current measuring systemExpiredFeb 22, 79Oct 06, 81[G01R]
4281231 High tension vacuum switchesExpiredNov 15, 78Jul 28, 81[H01H]
4271340 Electrical vacuum switch having means for generating an axial magnetic field between the contact facesExpiredDec 01, 78Jun 02, 81[H01H]
4227596 Contact deviceExpiredJun 07, 78Oct 14, 80[B60M]
4183598 Contact device for the transmission of electric current between a stationary contact part and a movable contact partExpiredJan 19, 78Jan 15, 80[H01R]

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