Inventor
Axel Grell
Inventor
Burgdorf, DE
Overview
Patents· 18 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Rprimary
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers61%
H04SStereophonic systems13%
A61FFilters implantable into blood vessels4%
G11BInformation storage based on relative movement between record carrier and transducer4%
H02JElectric power networks4%
H03GControl of amplification4%
H04MTelephonic communication4%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution4%
PatentTitleYear
10,477,293Headphone201910,178,465Headphone unit201910,128,806Method of controlling an audio amplifier unit and audio amplifier unit20189,918,179'Methods and devices for reproducing surround audio signals'20189,635,484'Methods and devices for reproducing surround audio signals'20179,247,337'Headphone and headset'20168,885,834'Methods and devices for reproducing surround audio signals'20148,731,231'Dynamic sound transducer and receiver'20148,363,874'Receiver'20138,295,530'Headphones and headset'20128,215,445'Electroacoustic transducer'20128,180,092'Converter system for an active noise compensation apparatus'20128,103,015'Wire-free headset, portable media player'20127,940,947'Headphone set'20117,639,832'Headphones'20097,292,703'Headphones'20077,162,051'Headphone'20076,934,401'Closed headphones with transducer system'2005Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2005–2019Based in Burgdorf, DE· patent location history
2007–2016Patents assigned to SENNHEISER ELECTRONIC (12)· patent assignee history
2012–2014Patents assigned to GRELL AXEL (7)· patent assignee history
2013–2014Patents assigned to KUHR MARKUS (3)· patent assignee history
2014–2018Patents assigned to SENNHEISER ELECTRONIC CORP (3)· patent assignee history
2014–2018Based in Wedemark, DE· patent location history
2017–2019Patents assigned to SENNHEISER ELECTRONIC GMBH & CO KG (5)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SENNHEISER ELECTRONIC | 12 | 2007–2016 |
| GRELL AXELself | 7 | 2012–2014 |
| SENNHEISER ELECTRONIC GMBH & CO KG | 5 | 2017–2019 |
| KUHR MARKUS | 3 | 2013–2014 |
| SENNHEISER ELECTRONIC CORP | 3 | 2014–2018 |
Locations
| Location | Patents | Span |
|---|---|---|
| Burgdorf, DE | 15 | 2005–2019 |
| Wedemark, DE | 3 | 2014–2018 |