Report: Japan's Threat

To US Firms GrowsWELLESLEY HILLS, Mass. - U.S. companies face tough competition in the next decade due to technological innovations by Japanese companies, a report by Venture Economics Inc. said.

The report, Japan Technology 50, compared 60,000 U.S. patents issued since 1975 to the 50 most active Japanese firms in several light and heavy industries.

A Japanese competitive edge no longer rests solely on high-volume, high- efficiency production based on established technologies but on technological innovation that contributed to Japanese automakers' current edge, the recent report said.

The study analyzed the technological strength of Japanese companies by counting the quality as well as the quantity of a company's patents. Patent data also was tied to U.S. Standard Industrial Classification codes to show a company's activity in a specific industry and to allow comparisons among companies.

Allied Unit Enters Pact

With UK Aircraft Firm

MORRIS TOWNSHIP, N.J. - Allied-Signal Aerospace Co.'s Bendix Electric Power division has signed a joint venture agreement with the Ferranti Aircraft Equipment unit of Ferranti Instrumentation Ltd. of England.

Under the terms of the joint venture, the newly formed Ferranti/Bendix Power Generation Ltd. will make and supply electric power generating systems to the aerospace industry. The plant will be located in Manchester, England.

Ferranti/Bendix will concentrate at first on making a generating system that it will propose for use in the European Fighter Aircraft and in the Airbus Industrie A-340 aircraft.