![Tempered glass windows usually have an etched marking on the glass in the corner of the window that includes the supplier's name, place of fabrication, date manufactured, thickness, and certifications or safety Tempered glass windows usually have an etched marking on the glass in the corner of the window that includes the supplier's name, place of fabrication, date manufactured, thickness, and certifications or safety](https://basc.pnnl.gov/sites/default/files/images/Tempered_Glass_Etched_Marking_Supplier_Fabrication_UCEC_2021.jpg)
Tempered glass windows usually have an etched marking on the glass in the corner of the window that includes the supplier's name, place of fabrication, date manufactured, thickness, and certifications or safety
![Simple & Elegant!! The "Mountain View" Stained and Beveled Glass Window (Insulated In Tempered Glass Simple & Elegant!! The "Mountain View" Stained and Beveled Glass Window (Insulated In Tempered Glass](https://www.stainedglasswindows.com/wp-content/uploads/2019/07/knew.jpg)
Simple & Elegant!! The "Mountain View" Stained and Beveled Glass Window (Insulated In Tempered Glass
![A tempered glass window can be identified by the “bug” or white etched label at one corner of the window. | Building America Solution Center A tempered glass window can be identified by the “bug” or white etched label at one corner of the window. | Building America Solution Center](https://basc.pnnl.gov/sites/default/files/images/Tempered_Glass_Bug_Etched_Label_WildfireRetrofitGuide_IBHS_2020.jpg)