Edward Richardson
Analyst · 21st Century Equity
Thanks, Wendy. EDG sales in the third quarter were $24.2 million, flat with the prior year. Gross margin was 29.5% compared to 30.4% last year due to product and geographic mix of sales. Revenues in both the Asia-Pacific and European regions exceeded sales compared to last year.
Business in some of our product lines and market segments increased. Demand for industrial products in the textile, wood and plastic industries continue to improve, and as a result, sales in our industrial heating business increased over the third quarter last year.
The CO2 laser tube business and the associated consumable parts performed well. Sales of consumable parts nearly doubled again over the prior year. We were also pleased to see our sales in the marine business increase over the prior year, as major shipbuilders ramped up production after a period of slowdown.
We're also happy to see a nice increase in high-power capacitors during the quarter, as our efforts to further penetrate this business begin to take hold.
We're seeing many inquiries for new applications for both RF and microwave generators across various markets and applications, including mining, industrial heating, cooking, drying and plasma. Our new product development team of microwave engineers is heavily involved with the sales and marketing groups to ensure we are engineering solutions that can be marketed and sold to many more markets.
We've recently booked some substantial orders for microwave generators in China, with additional significant projects in the pipeline. The initial prototype order for one project exceeded $1 million. Now a second order for $1 million is in process. We signed an exclusive agreement with this customer in March, which provides for a minimum purchase of 27 generators, with the potential for more than 100 new systems that use 9 generators in each system, which will be installed over an extended period of time.
We're also quite pleased with the progress of the engineering firm that we acquired last July in Germany to expand our activity in the power capacitor market. We estimate the power capacitor market to be about $200 million annually. The additional resources have helped expand a number of products that we now offer.
We're also strengthening our ability to offer solutions to the original equipment manufacturers. Historically, our focus has been on the replacement market. With our standard engineering resources, we are developing unique products and widening our product range with new partnerships. As a result of our investment and effort, our revenue and backlog for power capacitors is increasing.
Overall, we're disappointed that we weren't seeing more growth in EDG, but we believe the building blocks are in place to capitalize on the economic recovery, and we remain convinced that our investments are focused on areas with high-growth potential. All of this bodes well for our future and our ability to capitalize on our existing global infrastructure.
As we look to the future of Richardson Electronics, we continue to build the line of replacement parts for the diagnostic imaging market. Our initial focus is on glassware, which includes flat panel detectors, as well as CT and X-ray tubes.
We've signed an agreement with Thales to distribute a complete line of flat panel detectors for replacement and diagnostic imaging equipment. The resale price of these detectors ranges from $75,000 to $100,000 each, which will be below the price offered by the original equipment manufacturers. We have plans to expand our portfolio of flat panel detector replacement solutions later in the calendar year. We're confident that our sales in the diagnostic imaging replacement market will grow through the balance of FY '14 and more significantly, in FY '15 and beyond.
We continue to feel there's a major opportunity to become an independent supplier to the healthcare industry of a wide range of high-quality replacement parts at price levels well below the OEMs'. The trend for hospitals to use third-party service organizations and to buy replacement parts outside of the OEM is rapidly spreading throughout the U.S. and the rest of the world.
With our global infrastructure, technical sales team and experience serving the health care market, we're uniquely positioned to take advantage of this trend. This will gradually expand Richardson Electronics' position from being the leader in Power Grid Tubes to a key player in the high-growth, high-profile health care industry.
We repeat our commitment to our shareholders that we'll use the funds received from the sale of RFPD in March 2011 to make strategic acquisitions, invest in growth strategies and repurchase stock. Today, we've spent $6 million on acquisitions, which provided additional resources, customers and knowledge base support to the Electron Device Group. We're investing in resources to develop our own intellectual property and [indiscernible] more sophisticated sales in the future.
We've spent $56 million on our stock buyback program, which has reduced the number of shares outstanding to 14 million. We're confident that our acquisition program will accelerate in the near future, which will ultimately result in substantial revenue and earnings growth.
While economic conditions have made sales growth challenging, we do see the global economy slowly improving. At the same time, we've worked hard to improve the efficiency throughout the company and reduce costs within the business wherever possible.
At this point, Kathy, Wendy and I will be happy to answer your questions.