Yes - the Lamda was the first unibody car, so to speak. Or the first monocoque, depending on how you look at it. But when introduced in 1922, it came only as a tourer with a heavy, complicated optional hardtop that had to be stowed at home. A year later it gained a closed variant. The Voisin C6 racer, shown above, was also a stressed-member monocoque. But it's weight was a serious handicap - as the lamda's would be as it grew larger and more luxurious until it's 1931 demise.
There were many innovations in Europe in the interwar period, but because of the devostation of WW1, most of them would not be seen until the mid to late 1920's, and most were on high-end exotics - mainly from France, as France was, prior to WW2, where the best and most exotic cars came from (Bugatti, Amilcar, Delage, Delahaye, Voisin, etc.) and it had a huge domestic industry at the time (Panhard et levassor, Citroën, Peugeot, Berliet, Renault, Rosengart, Rolland-Pilian, Unic, Simca, etc.). Sadly nearly all of this was destroyed either by general decline in creativity (Mors, Clement-Bayard, Corre La Licorne), economic realities of mass production and the depression (Mathis, Suere, Berliet, Chenard-Walcker, Amilcar), or the final curtain call - the Nazi invasion.
One other thing that Voisin had noticed and acted upon was that his cars stopped far better when there were brakes on the front wheels.
In 1919 Gabriel Voisin had launched his first car - an updated, modified version of a Knight-engined Panhard that both Panhard and Andre Citroën had rejected. The factory workers worked hard to get the car into production and the first example was built on February 5th, 1919. Alas, something in the gearbox had been installed backwards and when put into gear, the car quickly took off backwards. The workers were upset, but Voisin's hapless reverse led him to discover that the brakes did a more effective job at the front. By 1921, his cars all had four-wheel-brakes.
At this time most cars only had rear brakes, often with an optional transmission brake, which was a holdover from the horseless carriage days and could be extremely destructive if used as anything but a parking brake.
1923 saw a major innovation then, when Rickenbacker became the first medium-priced, mass market car to offer four-wheel mechanical brakes. Duesenberg's had them previously, but like the Voisin they were not accessible to ordinary folks. Packard had introduced their four-wheel brakes some two weeks before Rickenbacker, but Rickenbacker had actually held them back for nearly a year, believing that the public was not ready for the innovation.
They were probably right - as Ford and Chevy did not add four-wheel brakes four four years after this, and they actively campaigned in the press against the "questionable safety" of having brakes on the front wheels as well as the rears.
Four-wheel brakes were a big deal, and like five-speed transmissions in the 1970's, many cars bore plates or trim noting tha they had them. This was as much advertising as safety, as the driver of a car without them would probably not be able to stop in time without rear-ending a car with four-wheel brakes, so the advertising on the rear of the cars advised caution to those behind. After the Rickenbacker announcement, four-wheel brakes proliferated in the auto industry both in America and abroad.
By the end of the 1920's a car was virtually unsaleable without four-wheel brakes, and the transmission brake was long gone except on a few true anachronisms.
Modified by Taimar2 at 3:45 PM 10-9-2005