CAMPBELL; DOUGLAS B.
Patent Applications and Registrations
Patent applications and USPTO patent grants for CAMPBELL; DOUGLAS B..The latest application filed is for "steel compositions, methods of manufacture and uses in producing rimfire cartridges".
- CAMPBELL; DOUGLAS B. - WAIKOLOA HI
- Campbell; Douglas B. - Loretto MN
- Campbell; Douglas B. - Natrick MA
- Campbell; Douglas B. - Natick MA
| Patent | Date |
|---|---|
| Steel Compositions, Methods Of Manufacture And Uses In Producing Rimfire Cartridges App 20200299795 - CAMPBELL; DOUGLAS B. ; et al. | 2020-09-24 |
| Steel compositions, methods of manufacture and uses in producing rimfire cartridges Grant 10,676,801 - Campbell , et al. | 2020-06-09 |
| Basketball training system Grant 10,596,436 - Campbell , et al. | 2020-03-24 |
| Sports training machine Grant 10,561,916 - Campbell , et al. Feb | 2020-02-18 |
| Basketball training system Grant 10,315,090 - Campbell , et al. | 2019-06-11 |
| Basketball Training System App 20180050250 - Campbell; Douglas B. ; et al. | 2018-02-22 |
| Basketball training system Grant 9,808,696 - Campbell , et al. November 7, 2 | 2017-11-07 |
| Basketball Training System App 20160325168 - Campbell; Douglas B. ; et al. | 2016-11-10 |
| Basketball Training System App 20160263457 - Campbell; Douglas B. ; et al. | 2016-09-15 |
| Steel Compositions, Methods Of Manufacture And Uses In Producing Rimfire Cartridges App 20160186281 - CAMPBELL; DOUGLAS B. ; et al. | 2016-06-30 |
| Volleyball training apparatus Grant 6,659,893 - Campbell , et al. December 9, 2 | 2003-12-09 |
| Ball toss apparatus Grant 5,980,399 - Campbell , et al. November 9, 1 | 1999-11-09 |
| Graphic-processing Apparatus Grant 3,639,059 - Strumor , et al. February 1, 1 | 1972-02-01 |
| Bipolar Digital-to-analog Converter Grant 3,582,939 - Campbell June 1, 1 | 1971-06-01 |
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