1. Kazumi, O. Diamond bearing microscopic certificate of appraisal. Patent US 4,056,952 A (1977).
2. Kaplan, G. R. Laser making system and certificate for a gemstone. Patent US 6, 1 (2001).
3. Kaplan, G. R. Microinscribed gemstone. Patent US 7, 2 (2010).
4. Rosario et al. System and method for gemstone. Patent US 8,319,145 B2, (2012).
5. Sima, F. Three-dimensional femtosecond laser processing for lab-on-a-chip applications. Nanophotonics 7, 613–634 (2018).