All references are either to private communications (P), or to books by Doebeli (D), Vetter (V), and Armbruster (A), as noted by page number.
#Friedrich serial number date of manufacture serial numbers#
Trademark Serial Number is a unique ID to identify the ORLEN mark in USPTO. The following chart correlates serial numbers with delivery dates and model designations. if possible at all.Ĭopyright © Daniel O'Neill 1997-2022. Serial Number format: H55116328 (This serial number is from actual air-conditioning unit). The ORLEN trademark was assigned a Serial Number 78257611 by the United States Patent and Trademark Office (USPTO). Those will need manual intervention of a product knowledgeable specialist to date them. This service will NOT date antique models nor even those built in the 1950's or 1960's. Please note, this list is estimated production and a work in. this has enabled me to compile a dating chart by serial number. Unfortunately only modern appliances made after the 1970's or 1980's are possible to date this way (and sometimes not even then). The two dates shown on the majority of Paquet - Maelzel metronone trade labels are 1815-1846, the former being the year the patent was first approved by Maelzel and 1846 being the year that Paquet took over the helm. We have provided this service to try to help them to date their major appliances (fridge, stove, dishwasher, washer, dryer, etc.) accurately from the code usually contained within their serial number. Homeowners are often curious of the age of their home appliances.
We are committed to innovation and dedicated to environmentally clean, economically sound, and superbly comfortable home and business environments. Appliance411: Service: How old is my appliance? Age finder, date of manufacture code decryption help for your appliances ClimateMaster is the world’s largest and most progressive manufacturer of water source and geothermal heat pump systems for residential and commercial markets.