"we previously established" is correct and usable in written English.
You can use it to refer to a fact or idea that has already been established in the past. For example, "We previously established that the project timeline would be six months long."
In this case we previously established exponential stability of the beam-joint system.
We previously established a mouse pancreatic stem cell line without genetic manipulation.
We previously established that alleviation of DSBs in the RAM is necessary for tolerance to high-B stress in plants7.
We previously established a gene-based technology to generate some flaviviral antigens useful for functional antibody assays.
We previously established a transgenic Chinese hamster CHL/IU cell line, designated as KN63, for concurrent analysis of gene mutations and chromosome aberrations.
We previously established that lentils were able to significantly attenuate the development of hypertension in spontaneously hypertensive rats (SHRs), but the mechanism was not investigated.
We previously established a biomimetic matrix composition which supports the growth of human umbilical vein endothelial cells (HUVECs) while maintaining normal physiology in vitro.
We previously established long-term, 3-dimensional culture of organoids from mouse tissues (intestine, stomach, pancreas, and liver) and human intestine and pancreas.
To ascertain potentially significant genes in the CBX6-associated tumorigenesis, we performed microarray analysis on a U251MG glioma cell line overexpressing CBX6 that we previously established (Deng et al., unpublished results).
We previously established the autochthonous transgenic adenocarcinoma mouse prostate (TRAMP) model to facilitate characterization of molecular mechanisms involved in the initiation and progression of prostate cancer.
To isolate a- and α-type cells, we previously established a growth selection system for laboratory yeast strains using the auxotrophic marker URA3 (Fukuda et al. 2013a).
