There are many manufacturers of overbed tables, and some of the top manufacturers include: 

1. Invacare: Invacare is a leading manufacturer of healthcare products, including overbed tables. Their overbed tables are designed to be durable, lightweight, and easy to adjust. 

1. Drive Medical: Drive Medical is a popular manufacturer of medical equipment and supplies, including overbed tables. Their overbed tables are designed to be sturdy and easy to adjust, with features such as locking wheels and adjustable tabletops. 

1. Graham-Field: Graham-Field is a leading manufacturer of medical equipment and supplies, including overbed tables. Their overbed tables are designed to be durable, lightweight, and easy to adjust, with features such as locking wheels and adjustable table tops. 

1. Medline: Medline is a leading manufacturer of medical equipment and supplies, including overbed tables. Their overbed tables are designed to be lightweight, easy to adjust, and easy to clean. 

1. Carex: Carex is a manufacturer of healthcare products, including overbed tables. Their overbed tables are designed to be lightweight, durable, and easy to adjust, with features such as tilting table tops and adjustable heights. 

There are many other manufacturers of overbed tables as well, and it is important to choose a product that meets the specific needs and circumstances of the patient. It is also important to ensure that the overbed table is installed and used safely and appropriately.