Caldwell; Allen A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Caldwell; Allen A..The latest application filed is for "ladder tripod assembly and system".
- Caldwell; Allen A. - Shakopee MN
- Caldwell; Allen A. - Savage MN
| Patent | Date |
|---|---|
| Ladder Tripod Assembly And System App 20210123302 - Caldwell; Allen A. ; et al. | 2021-04-29 |
| Extendable / retractable ladder Grant 10,753,149 - Kieffer , et al. A | 2020-08-25 |
| Foldable ladder Grant 10,731,413 - Kieffer , et al. | 2020-08-04 |
| Foldable Ladder App 20190093428 - Kieffer; Mitchell I. ; et al. | 2019-03-28 |
| Foldable ladder Grant 10,233,692 - Kieffer , et al. | 2019-03-19 |
| Extendable / Retractable Ladder App 20190003254 - Kieffer; Mitchell I. ; et al. | 2019-01-03 |
| Extendable / retractable ladder Grant 10,053,912 - Kieffer , et al. August 21, 2 | 2018-08-21 |
| Extendable / Retractable Ladder App 20180010388 - Kieffer; Mitchell I. ; et al. | 2018-01-11 |
| Foldable Ladder App 20170145745 - Kieffer; Mitchell I. ; et al. | 2017-05-25 |
| Foldable ladder Grant 9,580,959 - Kieffer , et al. February 28, 2 | 2017-02-28 |
| Hinge for a telescoping stepladder Grant D767,784 - Kieffer , et al. September 27, 2 | 2016-09-27 |
| Telescoping ladder with stabilizers Grant 9,416,591 - Kieffer , et al. August 16, 2 | 2016-08-16 |
| Telescoping Ladder With Stabilizers App 20160153232 - Kieffer; Mitchell I. ; et al. | 2016-06-02 |
| Foldable Ladder App 20160153231 - Kieffer; Mitchell I. ; et al. | 2016-06-02 |
| Extendable / Retractable Ladder App 20120267197 - Kieffer; Mitchell I. ; et al. | 2012-10-25 |
| Extendable/retractable ladder Grant 8,225,906 - Kieffer , et al. July 24, 2 | 2012-07-24 |
| Step ladder Grant D624,200 - Kieffer , et al. September 21, 2 | 2010-09-21 |
| Extendable / Retractable Ladder App 20100044155 - Kieffer; Mitchell I. ; et al. | 2010-02-25 |
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