Inventor
Johannes J. W. Kalfs
Inventor
Eindhoven, NL
Overview
Patents· 14 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer36%
H05BElectric heating18%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications18%
H04BTransmission9%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light5%
G01SRadio direction-finding5%
G06FElectric digital data processing5%
H04LTransmission of digital information, e.g. telegraphic communication5%
PatentTitleYear
9,869,758'Mitigating disturbance in sensing'20189,596,734'Anti-tampering daylight harvesting system'20179,574,934'Illumination sensor for distinguishing between different contributions to a sensed light level'20179,554,446'Calibration operation of a lighting device'20176,477,003'System for recording and/or reproducing information medium for use in the system, and magnetic write head and arrangement for formatting the medium'20026,061,196'System for recording and/or reproducing information medium for use in the system, and magnetic write head and arrangement for formatting the medium'20005,949,607'System, apparatus and method for recording and reproducing information'19995,933,290'Recording an information signal on a record carrier provided with tracking signals'19995,912,637'Magnetic recording method and apparatus which provide at least two write pulses for each binary signal bit to be recorded'19995,805,372'Positioning of a head relative to a plurality of tracks'19985,488,516'Apparatus for reproducing n digital signals from n adjacent tracks on a record carrier'19964,641,310'Data processing system in which unreliable words in the memory are replaced by an unreliability indicator'19874,481,385'Arrangement for cancelling echo signals'19844,464,746'Arrangement for correcting pulse distortion in homochronous data transmission'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984–1999Patents assigned to PHILIPS CORP (6)· patent assignee history
1984–2018Based in Eindhoven, NL· patent location history
1998Patents assigned to U S PHILIP CORP (1)· patent assignee history
1999–2000Patents assigned to ONSTREAM INC (2)· patent assignee history
2017–2018Patents assigned to PHILIPS LIGHTING HOLDING BV (4)· patent assignee history
2017–2018Patents assigned to KONINKLIJKE PHILIPS NV (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PHILIPS CORP | 6 | 1984–1999 |
| PHILIPS LIGHTING HOLDING BV | 4 | 2017–2018 |
| KONINKLIJKE PHILIPS NV | 2 | 2017–2018 |
| ONSTREAM INC | 2 | 1999–2000 |
| U S PHILIP CORP | 1 | 1998 |
Locations
| Location | Patents | Span |
|---|---|---|
| Eindhoven, NL | 14 | 1984–2018 |