Door operation system
US-12577832-B2 · Mar 17, 2026 · US
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Frede Friedhelm patents
Frede Friedhelm is listed as an inventor on 11 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Frede Friedhelm |
| Total patents | 11 |
| First publication | Mar 24, 2015 |
| Latest publication | Mar 17, 2026 |
Notable patents
Publications ranked by popularity score, then publication date.
High speed overhead door
US-11661778-B2 · May 30, 2023 · US
A door operation system
US-2023090663-A1 · Mar 23, 2023 · US
High speed overhead door
US-2020300014-A1 · Sep 24, 2020 · US
Roller shutter for opening and closing a doorway
US-10253557-B2 · Apr 9, 2019 · US
Sealing device for sealing a gap between a lintel and a roller shutter and a roller shutter with such a sealing device
US-9957749-B2 · May 1, 2018 · US
Roller shutter for opening and closing a doorway
US-9915094-B2 · Mar 13, 2018 · US
Sealing device for sealing a gap between a lintel and a roller shutter and a roller shutter with such a sealing device
US-2017152705-A1 · Jun 1, 2017 · US
Roller Shutter for Opening and Closing a Doorway
US-2017101818-A1 · Apr 13, 2017 · US
Roller Shutter for Opening and Closing a Doorway
US-2015361715-A1 · Dec 17, 2015 · US
Recent patents
Latest publications not already listed above.
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Assa Abloy Entrance Systems Ab | 11 |
| Steffen Meinolf | 1 |
| Siewert Holger | 1 |
| Frede Friedhelm | 1 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| E06B9/17 | 6 |
| E06B9/58 | 6 |
| E06B9/15 | 5 |
| E06B9/17061 | 4 |
| E06B9/18 | 4 |