Take photo of the logo and the piece of furniture and bring them to a knowledgeable antique dealer, appraiser or interior designer. Start at an antique mall with several dealers who can try to identify your logo or refer you to a furniture specialist or appraiser. Visit established furniture stores with designers who may be able to help.
Visit online search sites such as cabinetmakersearch.com that have searchable databases of furniture makers. Enter the name that appears on the logo if possible and search to see if anything comes up. You can further your research with this start.
Look up the logo in furniture reference books found at the library or suggested by websites such as collectics.com. There are many books containing photos and information about furniture makers that may help you identify the furniture logo.
Post a photo or description of the furniture logo on the online forum of sites such as lushpad.com, myfurnitureforum.com or antiquesandthearts.com and ask other forum viewers if they can identify the logo.
Attend an Antique Roadshow's appraisal event with your piece of furniture or just the logo if the furniture is too large to bring with you. These events, held around the country, have expert appraisers who are very knowledgeable about furniture history and worth. Obtain tickets in advance through the PBS website.