Yossi Gross

Rainbow Medical, based in Herzliya Pituach, Israel, was launched in 2007 with $20 million in funding from GlenRock Israel, NGN Capital, SVM Asset Management and individuals. Rainbow Medical has aspects of a venture fund and a US-style incubator. Rainbow mainly supports the technology ideas of Yossi Gross. Rainbow Medical finances its start-up companies at their beginnings. Subsequent investment is done on an individual company basis through both outside investors and select Rainbow investors.

In 2007, Leon Recanati and Gross, together with Cohen-Arazi, reviewed a series of Gross's ideas and chose 15 technologies on which to focus. Below follows a list of some of the early stage startup companies that Rainbow has established out of these 15 by segment. The products of these companies are all at the pre-clinical stage of development. As of December, 2019, no submissions by these companies to the FDA have been made for device approvals.

Gross's first medical creation was a small mini-pump to deliver drugs which he developed in an equally owned joint venture with Elan Corporation called Elan Medical Technologies, a subsidiary of Elan Pharmaceuticals. Gross spent most of the 1990s working at Elan developing drug delivery systems, the patents of which are assigned to Elan. In 1998, Elan bought Gross out. He stayed on for a short while as the vice president of research and development, before leaving to begin building his own business.

From the late 1990s through 2007, Gross launched 27 separate medical device companies, all based on his patents and inventions. Venture and equity investors in these companies include: Pitango, Three Arch, HBM Bioventures, Delta Ventures, Onset Ventures, Alice Ventures and the Infinity Group. Other companies that have either invested in or acquired these companies include: Medtronic Inc., Boston Scientific Corporation, Teva Pharmaceutical Industries Ltd., Elan Medical Technology, Elron Electronic Industries and American Medical Systems.

In 1985, Gross opened General Ideas and Products Ltd., where he developed several small electric consumer appliances. From 1988 to 1995, Gross also directed the R&D operations of Scientific Innovations.

Yossi Gross was born in Budapest, Hungary. He immigrated to Israel, with his Holocaust-survivor parents, at the age of three. His parents and family live on Moshav Mazor. Gross received an MSc degree in 1976 in aeronautical engineering from the Technion Israel Institute of Technology in Haifa, Israel.

Following his graduation from the Technion in 1976, Gross joined Israel AirCraft Industries where he began to work as a flight test engineer from 1977 to 1985. Gross was on the management team of the IAI Lavi project, a program tasked to design and build a fighter jet, similar to the F-16, for the Israeli Air Force. The program was later cancelled.

Yossi Gross (Hebrew: יוסי גרוס; born February 5, 1947) is an Israeli engineer, inventor and entrepreneur. He is a founding partner of Rainbow Medical, an operational investment company, established to launch companies based on the technological ideas and inventions of Gross. Yossi Gross first started his professional career in the 20th century as a project manager of the Lavi (IAI Lavi ) program for the Israel Air Force. From the 1990s through to the beginning of the 21st century, Gross started 27 medical device companies based on his various inventions in electronics, signal processing, nanotechnology, drug delivery and neurostimulation. Gross's various companies have developed or are currently developing treatments for diabetes, gastroenterology, stroke, ophthalmology, asthma, congestive heart failure, and urology. Gross has 567 filed patents.