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Patent applications and USPTO patent grants for Lofgren; Bo Carl Fredrik.The latest application filed is for "air-spring compensation in a piston-type marine vibrator".
Patent | Date |
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Air-spring compensation in a piston-type marine vibrator Grant 10,488,536 - Tenghamn , et al. Nov | 2019-11-26 |
Gas spring compensation marine acoustic vibrator Grant 9,864,080 - Tenghamn , et al. January 9, 2 | 2018-01-09 |
Air-spring compensation in a piston-type marine vibrator Grant 9,507,037 - Tenghamn , et al. November 29, 2 | 2016-11-29 |
Air-Spring Compensation in a Piston-Type Marine Vibrator App 20150085608 - Tenghamn; Stig Rune Lennart ;   et al. | 2015-03-26 |
Gas Spring Compensation Marine Acoustic Vibrator App 20140340985 - Tenghamn; Stig Rune Lennart ;   et al. | 2014-11-20 |
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